The Arcus Novus was an ancient arch in Rome, located on the Via Lata (now the Via del Corso ), at the site of the church of Santa Maria in Via Lata .
172-524: The arch was dedicated to Diocletian either for the occasion of his decennalia in 293 AD, or his triumph celebrated with Maximian in 303–304. The name Arcus novus (new arch) probably refers to the earlier Arch of Claudius on the same street. The Arcus Novus was decorated with reliefs reused ( spolia ) from a large altar of the Julio-Claudian period, most probably the Ara pietatis , while
344-517: A Babylonian rabbi called Samuel . This friendship was advantageous for the Jewish community and gave them a respite from the oppressive laws enacted against them. Later kings reversed Shapur's policy of religious tolerance. When Shapur's son Bahram I acceded to the throne, he was pressured by the Zoroastrian high-priest Kartir Bahram I to kill Mani and persecute his followers. Bahram II
516-620: A ceremony in the Temple of Jupiter . From Ravenna, Diocletian left for the Danube. There, possibly in Galerius's company, he took part in a campaign against the Carpi. He contracted a minor illness while on campaign, but his condition quickly worsened and he chose to travel in a litter . In the late summer, he left for Nicomedia. On 20 November 304, he appeared in public to dedicate the opening of
688-550: A cruel and oppressive tyrant. Julianus' forces were weak, and were handily dispersed when Carinus' armies moved from Britain to northern Italy. As the leader of the united East, Diocletian was clearly the greater threat. Over the winter of 284–85, Diocletian advanced west across the Balkans . In the spring, some time before the end of May, his armies met Carinus' across the river Margus ( Great Morava ) in Moesia . In modern accounts,
860-570: A general amnesty, which brought Armenia back into the Sassanid Empire. Around 570, "Ma 'd-Karib", half-brother of the King of Yemen, requested Khosrow I's intervention. Khosrow I sent a fleet and a small army under a commander called Vahriz to the area near present Aden , and they marched against the capital San'a'l, which was occupied. Saif, son of Mard-Karib, who had accompanied the expedition, became King sometime between 575 and 577. Thus,
1032-500: A hunting trip in 309. Following Hormizd II's death, northern Arabs started to ravage and plunder the western cities of the empire, even attacking the province of Fars, the birthplace of the Sassanid kings. Meanwhile, Persian nobles killed Hormizd II's eldest son, blinded the second, and imprisoned the third (who later escaped into Roman territory). The throne was reserved for Shapur II , the unborn child of one of Hormizd II's wives who
1204-423: A legitimizing and unifying ideal. This period saw the construction of many grand monuments, public works, and patronized cultural and educational institutions. The Sasanian Empire's cultural influence extended far beyond the physical territory that it controlled, impacting regions as distant as Western Europe , Eastern Africa , and China and India . It also helped shape European and Asian medieval art. With
1376-559: A lieutenant. According to Eutropius , Diocletian raised his fellow-officer Maximian to the office of Caesar , making him his heir and effective co-ruler. The concept of dual rulership was not new to the Roman Empire. Augustus , the first emperor, had nominally shared power with his colleagues, and a formal office of co-emperor (co- Augustus ) had existed from Marcus Aurelius onward. Most recently, Emperor Carus and his sons had ruled together, albeit unsuccessfully. Diocletian
1548-582: A line of succession. Galerius and Constantius would become Augusti after the departure of Diocletian and Maximian. Maximian's son Maxentius and Constantius's son Constantine would then become Caesars. In preparation for their future roles, Constantine and Maxentius were taken to Diocletian's court in Nicomedia. Diocletian spent the spring of 293 travelling with Galerius from Sirmium ( Sremska Mitrovica , Serbia ) to Byzantium ( Istanbul , Turkey ). Diocletian then returned to Sirmium, where he remained for
1720-596: A major Byzantine offensive in Armenia was defeated at Anglon . Also in 541, Khosrow I entered Lazica at the invitation of its king, captured the main Byzantine stronghold at Petra , and established another protectorate over the country, commencing the Lazic War . A five-year truce agreed to in 545 was interrupted in 547 when Lazica again switched sides and eventually expelled its Persian garrison with Byzantine help;
1892-712: A member of the Parthian House of Karen , one of the Seven Great Houses of Iran , quickly raised a new force and stopped the Hephthalites from achieving further success. Peroz's brother, Balash , was elected as shah by the Iranian magnates, most notably Sukhra and the Mihranid general Shapur Mihran . Balash (484–488) was a mild and generous monarch, and showed care towards his subjects, including
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#17327810285922064-577: A monumental inscription in Persian and Greek in the vicinity of Persepolis . He exploited his success by advancing into Anatolia (260), but withdrew in disarray after defeats at the hands of the Romans and their Palmyrene ally Odaenathus , suffering the capture of his harem and the loss of all the Roman territories he had occupied. Shapur had intensive development plans. He ordered the construction of
2236-635: A number of battles he crushed them and drove them out beyond the Oxus river in 450. During his eastern campaign, Yazdegerd II grew suspicious of the Christians in the army and expelled them all from the governing body and army. He then persecuted the Christians in his land, and, to a much lesser extent, the Jews . In order to reestablish Zoroastrianism in Armenia, he crushed an uprising of Armenian Christians at
2408-608: A public ceremony at Antioch , the official version of events was clear: Galerius was responsible for the defeat; Diocletian was not. Diocletian publicly humiliated Galerius, forcing him to walk for a mile at the head of the Imperial caravan, still clad in the purple robes of the Emperor. Galerius was reinforced, probably in the spring of 298, by a new contingent collected from the empire's Danubian holdings. Narseh did not advance from Armenia and Mesopotamia, leaving Galerius to lead
2580-410: A rational system of taxation based upon a survey of landed possessions , which his father had begun, and he tried in every way to increase the welfare and the revenues of his empire. Previous great feudal lords fielded their own military equipment, followers, and retainers. Khosrow I developed a new force of dehqans , or "knights", paid and equipped by the central government and the bureaucracy, tying
2752-464: A relatively peaceful era with the Romans, and he even took the young Theodosius II (408–450) under his guardianship. Yazdegerd also married a Jewish princess, who bore him a son called Narsi. Yazdegerd I's successor was his son Bahram V (421–438), one of the most well-known Sasanian kings and the hero of many myths. These myths persisted even after the destruction of the Sasanian Empire by
2924-412: A restorer, a figure of authority whose duty it was to return the empire to peace, to recreate stability and justice where barbarian hordes had destroyed it. He arrogated, regimented and centralized political authority on a massive scale. In his policies, he enforced an Imperial system of values on diverse and often unreceptive provincial audiences. In the Imperial propaganda from the period, recent history
3096-592: A revolt swept the region after Galerius's departure. The usurper Domitius Domitianus declared himself Augustus in July or August 297. Much of Egypt, including Alexandria , recognized his rule. Diocletian moved into Egypt to suppress him, first putting down rebels in the Thebaid in the autumn of 297, then moving on to besiege Alexandria. Domitianus died in December 297, by which time Diocletian had secured control of
3268-493: A statement that he was aged 68 at death (alongside other evidence). His parents were of low status; Eutropius records "that he is said by most writers to have been the son of a scribe, but by some to have been a freedman of a senator called Anulinus." The first forty years of his life are mostly obscure. Diocletian was considered an Illyricianus ( Illyrian ) who had been schooled and promoted by Aurelian . The 12th-century Byzantine chronicler Joannes Zonaras states that he
3440-404: A statue of Jupiter, his patron deity, Diocletian addressed the crowd. With tears in his eyes, he told them of his weakness, his need for rest, and his will to resign. He declared that he needed to pass the duty of empire on to someone stronger. He thus became the first (and arguably only) Roman emperor to voluntarily abdicate his title. Most in the crowd believed that Constantine and Maxentius,
3612-800: A strategically critical area for control of the Silk Road . Shapur therefore marched east toward Transoxiana to meet the eastern nomads, leaving his local commanders to mount nuisance raids on the Romans. He crushed the Central Asian tribes, and annexed the area as a new province. In the east around 325, Shapur II regained the upper hand against the Kushano-Sasanian Kingdom and took control of large territories in areas now known as Afghanistan and Pakistan . Cultural expansion followed this victory, and Sasanian art penetrated Transoxiana , reaching as far as China. Shapur, along with
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#17327810285923784-426: A time of civil war, savage despotism, and imperial collapse. In those inscriptions that bear their names, Diocletian, the "founder of eternal peace", and his companions are referred to as "restorers of the whole world", men who succeeded in "defeating the nations of the barbarians, and confirming the tranquility of their world". The theme of restoration was conjoined to an emphasis on the uniqueness and accomplishments of
3956-703: A victory in the ongoing conflict with Persia , and Diocletian was hailed as the "founder of eternal peace". The events might have represented a formal end to Carus's eastern campaign, which probably ended without an acknowledged peace. At the conclusion of discussions with the Persians, Diocletian re-organized the Mesopotamian frontier and fortified the city of Circesium (Buseire, Syria) on the Euphrates . Maximian's campaigns were not proceeding as smoothly. The Bagaudae had been easily suppressed, but Carausius ,
4128-632: A way military power and dynastic claims could not. After his acclamation, Maximian was dispatched to fight the rebel Bagaudae , insurgent peasants of Gaul. Diocletian returned to the East, progressing slowly. By 2 November, he had only reached Civitas Iovia (Botivo, near Ptuj , Slovenia ). In the Balkans during the autumn of 285, he encountered a tribe of Sarmatians who demanded assistance. The Sarmatians requested that Diocletian either help them recover their lost lands or grant them pasturage rights within
4300-399: Is more likely that these actually submitted to Ardashir's son, the future Shapur I . In the west, assaults against Hatra , Armenia and Adiabene met with less success. In 230, Ardashir raided deep into Roman territory, and a Roman counter-offensive two years later ended inconclusively. Ardashīr began leading campaigns into Greater Khurasan as early as 233, extending his power to Khwarazm in
4472-402: Is unclear. At the conclusion of the peace, Tiridates regained both his throne and the entirety of his ancestral claim. Rome secured a wide zone of cultural influence, which led to a wide diffusion of Syriac Christianity from a center at Nisibis in later decades, and the eventual Christianization of Armenia. To strengthen the defence of the east Diocletian had a fortified road constructed at
4644-521: The fasces in place of Carinus and Numerian. Bassus was a member of a senatorial family from Campania , a former consul and proconsul of Africa, chosen by Probus for signal distinction. He was skilled in areas of government where Diocletian presumably had no experience. Diocletian's elevation of Bassus symbolized his rejection of Carinus' government in Rome, his refusal to accept second-tier status to any other emperor, and his willingness to continue
4816-532: The Alamanni . Diocletian invaded Germania through Raetia while Maximian progressed from Mainz. Each burned crops and food supplies as he went, destroying the Germans' means of sustenance. The two men added territory to the empire and allowed Maximian to continue preparations against Carausius without further disturbance. On his return to the East, Diocletian managed what was probably another rapid campaign against
4988-595: The Battle of Vartanantz in 451. The Armenians, however, remained primarily Christian. In his later years, he was engaged yet again with the Kidarites right up until his death in 457. Hormizd III (457–459), the younger son of Yazdegerd II, then ascended to the throne. During his short rule, he continually fought with his elder brother Peroz I , who had the support of the nobility, and with the Hephthalites in Bactria . He
5160-706: The Mamikonian family, touching off a revolt which led to the massacre of the Persian governor and his guard in 571, while rebellion also broke out in Iberia . Justin II took advantage of the Armenian revolt to stop his yearly payments to Khosrow I for the defense of the Caucasus passes. The Armenians were welcomed as allies, and an army was sent into Sassanid territory which besieged Nisibis in 573. However, dissension among
5332-678: The Muslim conquest of Persia , the influence of Sasanian art , architecture , music , literature , and philosophy was gradually absorbed into nascent Islamic culture , which, in turn, ensured the spread of Iranian culture, knowledge, and ideas throughout the expanding Muslim world . Officially, the empire was known as the Empire of the Iranians ( Middle Persian : 𐭠𐭩𐭥𐭠𐭭𐭱𐭲𐭥𐭩 , ērānšahr , Parthian : 𐭀𐭓𐭉𐭀𐭍𐭇𐭔𐭕𐭓 , aryānšahr , Greek : Ἀριανῶν ἔθνος , Arianōn ethnos ),
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5504-557: The Quadi and Marcomanni immediately after the Battle of the Margus. He eventually made his way to northern Italy and made an imperial government, but it is not known whether he visited Rome at this time. There is a contemporary issue of coins suggestive of an imperial adventus (arrival) for the city, but some modern historians state that Diocletian avoided the city, to demonstrate that
5676-489: The Sarmatians . Diocletian replaced the prefect of Rome with his consular colleague Bassus. Most officials who had served under Carinus, however, retained their offices under Diocletian. In an act of clementia denoted by the epitomator of Aurelius Victor as unusual, Diocletian did not kill or depose Carinus's traitorous praetorian prefect and consul Aristobulus , but confirmed him in both roles. He later gave him
5848-459: The Tetrarchy , from a Greek term meaning "rulership by four". The Tetrarchs were more or less sovereign in their own lands, and they travelled with their own imperial courts, administrators, secretaries, and armies. They were joined by blood and marriage; Diocletian and Maximian now styled themselves as brothers, and formally adopted Galerius and Constantius as sons. These relationships implied
6020-507: The Tigris , taking Ctesiphon. Narseh had previously sent an ambassador to Galerius to plead for the return of his wives and children. Peace negotiations began in the spring of 299, with both Diocletian and Galerius presiding. The conditions of the peace were heavy: Persia would give up territory to Rome, making the Tigris the boundary between the two empires. Further terms specified that Armenia
6192-550: The first dam bridge in Iran and founded many cities, some settled in part by emigrants from the Roman territories, including Christians who could exercise their faith freely under Sassanid rule. Two cities, Bishapur and Nishapur , are named after him. He particularly favoured Manichaeism , protecting Mani (who dedicated one of his books, the Shabuhragan , to him) and sent many Manichaean missionaries abroad. He also befriended
6364-469: The second encounter , Roman forces seized Narseh's camp, his treasury, his harem, and his wife. Galerius continued down the Tigris, and took the Persian capital Ctesiphon before returning to Roman territory along the Euphrates. Narseh sent an ambassador to Galerius to plead for the return of his wives and children in the course of the war, but Galerius dismissed him. Serious peace negotiations began in
6536-649: The "Aurelius Valerius" family. The relationship between Diocletian and Maximian was quickly couched in religious terms. Around 287 Diocletian assumed the title Iovius (Jovius), and Maximian assumed the title Herculius (Hercules). The titles were probably meant to convey certain characteristics of their associated leaders. Diocletian, in Jovian style, would take on the dominating roles of planning and commanding; Maximian, in Herculian mode, would act as Jupiter's heroic subordinate. For all their religious connotations,
6708-647: The Alchon Tamgha and the name "Alchono" in Bactrian script on the obverse, and with attendants to a fire altar on the reverse. Shapur II pursued a harsh religious policy. Under his reign, the collection of the Avesta , the sacred texts of Zoroastrianism, was completed, heresy and apostasy were punished, and Christians were persecuted. The latter was a reaction against the Christianization of
6880-606: The Arabs. Bahram gained the crown after Yazdegerd's sudden death (or assassination), which occurred when the grandees opposed the king with the help of al-Mundhir , the Arabic dynast of al-Hirah . Bahram's mother was Shushandukht , the daughter of the Jewish Exilarch . In 427, he crushed an invasion in the east by the nomadic Hephthalites , extending his influence into Central Asia, where his portrait survived for centuries on
7052-486: The Byzantine Empire and met little effective resistance. Khosrow's generals systematically subdued the heavily fortified frontier cities of Byzantine Mesopotamia and Armenia, laying the foundations for unprecedented expansion. The Persians overran Syria and captured Antioch in 611. In 613, outside Antioch, the Persian generals Shahrbaraz and Shahin decisively defeated a major counter-attack led in person by
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7224-422: The Byzantine Empire held a small portion of western Armenia. Bahram IV's son Yazdegerd I (399–421) is often compared to Constantine I . Both were physically and diplomatically powerful, opportunistic, practiced religious tolerance and provided freedom for the rise of religious minorities. Yazdegerd stopped the persecution against the Christians and punished nobles and priests who persecuted them. His reign marked
7396-598: The Byzantine emperor Heraclius . Thereafter, the Persian advance continued unchecked. Jerusalem fell in 614, Alexandria in 619, and the rest of Egypt by 621. The Sassanid dream of restoring the Achaemenid boundaries was almost complete, while the Byzantine Empire was on the verge of collapse. This remarkable peak of expansion was paralleled by a blossoming of Persian art , music , and architecture . While successful at its first stage (from 602 to 622),
7568-525: The Byzantine generals not only led to an abandonment of the siege, but they in turn were besieged in the city of Dara , which was taken by the Persians. Capitalizing on this success, the Persians then ravaged Syria, causing Justin II to agree to make annual payments in exchange for a five-year truce on the Mesopotamian front, although the war continued elsewhere. In 576 Khosrow I led his last campaign, an offensive into Anatolia which sacked Sebasteia and Melitene , but ended in disaster: defeated outside Melitene,
7740-510: The Christians. However, he proved unpopular among the nobility and clergy who had him deposed after just four years in 488. Sukhra, who had played a key role in Balash's deposition, appointed Peroz's son Kavad I as the new shah of Iran. According to Miskawayh (d. 1030), Sukhra was Kavad's maternal uncle. Kavad I (488–531) was an energetic and reformist ruler. He gave his support to the sect founded by Mazdak , son of Bamdad, who demanded that
7912-493: The Eastern Romans, founded several cities, some of which were named after him, and began to regulate taxation and internal administration. After the reign of Kavad I, his son Khosrow I , also known as Anushirvan ("with the immortal soul"; ruled 531–579), ascended to the throne. He is the most celebrated of the Sassanid rulers. Khosrow I is most famous for his reforms in the aging governing body of Sassanids. He introduced
8084-659: The Eastern provinces soon thereafter. He returned with haste to the West, reaching Emesa by 10 May 290, and Sirmium on the Danube by 1 July 290. Diocletian met Maximian in Milan either in late December 290 or January 291. The meeting was undertaken with a sense of solemn pageantry. The emperors spent most of their time in public appearances. It has been surmised that the ceremonies were arranged to demonstrate Diocletian's continuing support for his faltering colleague. A deputation from
8256-535: The Egyptian countryside. Alexandria, whose defense was organized under Domitianus's former corrector Aurelius Achilleus , held out probably until March 298. Later in 298, the triumphal column now known as Pompey's Pillar was erected in Alexandria to honor Diocletian. Bureaucratic affairs were completed during Diocletian's stay: a census took place, and Alexandria, in punishment for its rebellion, lost
8428-410: The Euphrates in 296, he was eventually decisively defeated by them. Galerius had been reinforced, probably in the spring of 298, by a new contingent collected from the empire's Danubian holdings. Narseh did not advance from Armenia and Mesopotamia , leaving Galerius to lead the offensive in 298 with an attack on northern Mesopotamia via Armenia. Narseh retreated to Armenia to fight Galerius's force, to
8600-437: The Hephthalites. Smbat, with the aid of a Persian prince named Datoyean, repelled the Hephthalites from Persia, and plundered their domains in eastern Khorasan , where Smbat is said to have killed their king in single combat. After Maurice was overthrown and killed by Phocas (602–610) in 602, however, Khosrow II used the murder of his benefactor as a pretext to begin a new invasion, which benefited from continuing civil war in
8772-470: The Imperial household. This post earned him the honor of a consulship in 283. Carus's death, amid a successful war with Persia and in mysterious circumstances – he was believed to have been struck by lightning or killed by Persian soldiers – left his sons Numerian and Carinus as the new Augusti . Carinus quickly made his way to Rome from his post in Gaul and arrived there by January 284, becoming
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#17327810285928944-584: The Lower Danube extolled restored tranquility to the region. The defense came at a heavy cost but was a significant achievement in an area difficult to defend. Galerius, meanwhile, was engaged during 291–293 in disputes in Upper Egypt , where he suppressed a regional uprising. He returned to Syria in 295 to fight the revanchist Persian empire. Diocletian's attempts to bring the Egyptian tax system in line with Imperial standards stirred discontent, and
9116-493: The Persians at Rhesaina and regained the lost territories. The emperor Gordian III 's (238–244) subsequent advance down the Euphrates was defeated at Meshike (244), leading to Gordian's murder by his own troops and enabling Shapur to conclude a highly advantageous peace treaty with the new emperor Philip the Arab , by which he secured the immediate payment of 500,000 denarii and further annual payments. Shapur soon resumed
9288-619: The Persians suffered heavy losses as they fled across the Euphrates under Byzantine attack. Taking advantage of Persian disarray, the Byzantines raided deep into Khosrow's territory, even mounting amphibious attacks across the Caspian Sea . Khosrow sued for peace, but he decided to continue the war after a victory by his general Tamkhosrow in Armenia in 577, and fighting resumed in Mesopotamia. The Armenian revolt came to an end with
9460-538: The Roman Empire by Constantine the Great . Shapur II, like Shapur I, was amicable towards Jews , who lived in relative freedom and gained many advantages during his reign. At the time of his death, the Persian Empire was stronger than ever, with its enemies to the east pacified and Armenia under Persian control. From Shapur II's death until Kavad I 's first coronation, there was a largely peaceful period with
9632-508: The Roman Senate met with the emperors, renewing its infrequent contact with the Imperial office. The choice of Milan over Rome further snubbed the capital's pride. But then it was already a long-established practice that Rome itself was only a ceremonial capital, as the actual seat of the Imperial administration was determined by the needs of defense. Long before Diocletian, Gallienus (r. 253–68) had chosen Milan for his headquarters. If
9804-524: The Romans (by this time the Eastern Roman or Byzantine Empire ) engaged in just two brief wars with the Sasanian Empire, the first in 421–422 and the second in 440 . Throughout this era, Sasanian religious policy differed dramatically from king to king. Despite a series of weak leaders, the administrative system established during Shapur II's reign remained strong, and the empire continued to function effectively. After Shapur II died in 379,
9976-421: The Romans in the west, where Persian forces won a series of battles but were unable to make territorial gains due to the failure of repeated sieges of the key frontier city of Nisibis, and Roman success in retaking the cities of Singara and Amida after they had previously fallen to the Persians. These campaigns were halted by nomadic raids along the eastern borders of the empire, which threatened Transoxiana ,
10148-474: The Romans; an attempt by the Iberians in 524/525 to do likewise triggered a war between Rome and Persia. In 527, a Roman offensive against Nisibis was repulsed and Roman efforts to fortify positions near the frontier were thwarted. In 530, Kavad sent an army under Perozes to attack the important Roman frontier city of Dara . The army was met by the Roman general Belisarius , and, though superior in numbers,
10320-664: The Sasanian Empire encompassed all of modern-day Iran and Iraq and parts of the Arabian Peninsula (particularly Eastern Arabia and South Arabia ), as well as the Caucasus , the Levant , and parts of Central Asia and South Asia . One of the high points in Iranian civilization, the Sasanian dynasty's rule was characterized by a complex and centralized government bureaucracy, and also revitalized Zoroastrianism as
10492-421: The Sassanids were able to establish a base in South Arabia to control the sea trade with the east. Later, the south Arabian kingdom renounced Sassanid overlordship, and another Persian expedition was sent in 598 that successfully annexed southern Arabia as a Sassanid province, which lasted until the time of troubles after Khosrow II. Khosrow I's reign witnessed the rise of the dihqans (literally, village lords),
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#173278102859210664-399: The Tigris, and agreed not to interfere in the affairs of Armenia and Georgia. In the aftermath of this defeat, Narseh gave up the throne and died a year later, leaving the Sassanid throne to his son, Hormizd II . Unrest spread throughout the land, and while the new king suppressed revolts in Sakastan and Kushan, he was unable to control the nobles and was subsequently killed by Bedouins on
10836-691: The Tigris, had to hand over all the provinces the Persians had ceded to Rome in 298, as well as Nisibis and Singara, to secure safe passage for his army out of Persia. From around 370, however, towards the end of the reign of Shapur II , the Sasanians lost the control of Bactria to invaders from the north: first the Kidarites , then the Hephthalites and finally the Alchon Huns , who would follow up with an invasion of India . These invaders initially issued coins based on Sasanian designs. Various coins minted in Bactria and based on Sasanian designs are extant, often with busts imitating Sassanian kings Shapur II (r. 309 to 379) and Shapur III (r. 383 to 388), adding
11008-450: The ability to mint independently. Diocletian's reforms in the region, combined with those of Septimius Severus , brought Egyptian administrative practices much closer to Roman standards. Diocletian travelled south along the Nile the following summer, where he visited Oxyrhynchus and Elephantine . In Nubia, he made peace with the Nobatae and Blemmyes tribes. Under the terms of the peace treaty Rome's borders moved north to Philae and
11180-444: The alliance, Khosrow also married Maurice's daughter Miriam. Under the command of Khosrow and the Byzantine generals Narses and John Mystacon , the new combined Byzantine-Persian army raised a rebellion against Bahram, defeating him at the Battle of Blarathon in 591. When Khosrow was subsequently restored to power he kept his promise, handing over control of western Armenia and Caucasian Iberia . The new peace arrangement allowed
11352-543: The apocalypse. Diocletian entered the city of Rome in the early winter of 303. On 20 November, he celebrated, with Maximian, the twentieth anniversary of his reign ( vicennalia ), the tenth anniversary of the Tetrarchy ( decennalia ), and a triumph for the war with Persia. Diocletian soon grew impatient with the city, as the Romans acted towards him with what Edward Gibbon , following Lactantius , calls "licentious familiarity". The Roman people did not give enough deference to his supreme authority; they expected him to act
11524-451: The archaeological evidence, is that Carausius had held some important military post in Britain, already had a firm basis of power in Britain and Northern Gaul, and profited from the lack of legitimacy of the central government. Carausius strove to have his legitimacy as a junior emperor acknowledged by Diocletian: in his coinage, he extolled the "concord" between him and the central power. One bronze piece from 290 read PAX AVGGG, "the Peace of
11696-421: The army and bureaucracy more closely to the central government than to local lords. Emperor Justinian I (527–565) paid Khosrow I 440,000 pieces of gold as a part of the "eternal peace" treaty of 532. In 540, Khosrow broke the treaty and invaded Syria, sacking Antioch and extorting large sums of money from a number of other cities. Further successes followed: in 541 Lazica defected to the Persian side, and in 542
11868-409: The attention of Artabanus IV, the Parthian king, who initially ordered the governor of Khuzestan to wage war against Ardashir in 224, but Ardashir was victorious in the ensuing battles. In a second attempt to destroy Ardashir, Artabanus himself met Ardashir in battle at Hormozgan, where the former met his death. Following the death of the Parthian ruler, Ardashir went on to invade the western provinces of
12040-507: The autumn of 302. He ordered that the deacon Romanus of Caesarea have his tongue removed for defying the order of the courts and interrupting official sacrifices. Romanus was then sent to prison, where he was executed on 17 November 303. Diocletian left the city for Nicomedia in the winter, accompanied by Galerius. According to Lactantius, Diocletian and Galerius argued over imperial policy towards Christians while wintering at Nicomedia in 302. Diocletian believed that forbidding Christians from
12212-582: The blade, and high-status Manicheans must be sent to work in the quarries of Proconnesus ( Marmara Island , Turkey) or the mines of Phaeno in southern Palestine . All Manichean property was to be seized and deposited in the imperial treasury . Diocletian found much to be offended by in Manichean religion: its novelty, its alien origins, its perceived corruption of Roman morals, and its inherent opposition to long-standing religious traditions. His reasons for opposing Manichaeanism were also applied to his next target, Christianity. Diocletian returned to Antioch in
12384-454: The bureaucracy and military would be sufficient to appease the gods, but Galerius pushed for extermination. The two men sought the advice of the oracle of Apollo at Didyma . The oracle responded that the impious on Earth hindered Apollo's ability to provide advice. Rhetorically Eusebius records the Oracle as saying "The just on Earth..." These impious, Diocletian was informed by members of
12556-436: The campaign of Khosrau II had actually exhausted the Persian army and treasuries. In an effort to rebuild the national treasuries, Khosrau overtaxed the population. Thus, while his empire was on the verge of total defeat, Heraclius (610–641) drew on all his diminished and devastated empire's remaining resources, reorganised his armies, and mounted a remarkable, risky counter-offensive. Between 622 and 627, he campaigned against
12728-422: The circus beside his palace. He collapsed soon after the ceremonies. Over the winter of 304–05 he kept within his palace at all times. Rumors spread through the city that Diocletian's death was being kept secret until Galerius could assume power. On 13 December, it was falsely announced that Diocletian had killed himself. The city was sent into mourning from which it recovered after public declarations that Diocletian
12900-493: The city and its Senate were no longer politically relevant to the affairs of the empire. Diocletian dated his reign from his elevation by the army, not his ratification by the Senate, following the practice established by Carus, who had declared the Senate's ratification a useless formality. However, Diocletian offered proof of his deference towards the Senate by retaining Aristobulus as ordinary consul and colleague for 285 (one of
13072-630: The coinage of Bukhara (in modern Uzbekistan ). Bahram deposed the vassal king of the Iranian-held area of Armenia and made it a province of the empire. Bahram V's son Yazdegerd II (438–457) was in some ways a moderate ruler, but, in contrast to Yazdegerd I, he practised a harsh policy towards minority religions, particularly Christianity . However, at the Battle of Avarayr in 451, the Armenian subjects led by Vardan Mamikonian reaffirmed Armenia's right to profess Christianity freely. This
13244-685: The column plinths were decorated with images of Victoria , barbarian prisoners and the Dioskouri , probably from the facade of the nearby Temple of the Sun of Aurelian . The arch was destroyed in 1491 by order of Pope Innocent VIII during reconstruction of Santa Maria in Via Lata . Fragments of the reliefs were discovered in 1523 and added to the Della Valle collection before being acquired by Cardinal Ferdinand de' Medici in 1584, from where
13416-429: The court, could only refer to the Christians of the empire. At the behest of his court, Diocletian acceded to demands for universal persecution. On 23 February 303, Diocletian ordered that the newly built church at Nicomedia be razed. He demanded that its scriptures be burned, and seized its precious stores for the treasury. The next day, Diocletian's first "Edict against the Christians" was published. The edict ordered
13588-399: The destruction of Christian scriptures and places of worship across the empire, and prohibited Christians from assembling for worship. Before the end of February, a fire destroyed part of the Imperial palace. Galerius convinced Diocletian that the culprits were Christians, conspirators who had plotted with the eunuchs of the palace. An investigation was commissioned, but no responsible party
13760-653: The details of the fall of the Parthian Empire and subsequent rise of the Sassanian Empire in mystery. The Sassanian Empire was established in Estakhr by Ardashir I . Ardashir's father, Papak , was originally the ruler of a region called Khir. However, by 200, Papak had managed to overthrow Gochihr and appoint himself the new ruler of the Bazrangids . Papak's mother, Rodhagh, was the daughter of
13932-485: The emperors were not "gods" in the tradition of the Imperial cult – although they may have been hailed as such in Imperial panegyrics . Instead, they were seen as the gods' representatives, effecting their will on earth. The shift from military acclamation to divine sanctification took the power to appoint emperors away from the army. Religious legitimization elevated Diocletian and Maximian above potential rivals in
14104-421: The empire passed on to his half-brother Ardashir II (379–383; son of Hormizd II) and his son Shapur III (383–388), neither of whom demonstrated their predecessor's skill in ruling. Bahram IV (388–399) also failed to achieve anything important for the empire. During this time Armenia was divided by a treaty between the Roman and Sasanian empires. The Sasanians reestablished their rule over Greater Armenia, while
14276-526: The empire to remain essentially intact for another 150 years despite being near the brink of collapse in Diocletian's youth. Weakened by illness, Diocletian left the imperial office on 1 May 305, becoming the first Roman emperor to abdicate the position voluntarily. He lived out his retirement in his palace on the Dalmatian coast , tending to his vegetable gardens. His palace eventually became the core of
14448-450: The empire's frontiers than the traditional capital at Rome. Building on third-century trends towards absolutism , he styled himself an autocrat, elevating himself above the empire's masses with imposing forms of court ceremonies and architecture. Bureaucratic and military growth, constant campaigning, and construction projects increased the state's expenditures and necessitated a comprehensive tax reform. From at least 297 on, imperial taxation
14620-412: The empire's last, largest, and bloodiest official persecution of Christianity , failed to eliminate Christianity in the empire. After 324, Christianity became the empire's preferred religion under Constantine . Despite these failures and challenges, Diocletian's reforms fundamentally changed the structure of the Roman imperial government and helped stabilize the empire economically and militarily, enabling
14792-551: The empire's traditional enemy, and in 299, he sacked their capital, Ctesiphon . Diocletian led the subsequent negotiations and achieved a lasting and favorable peace. Diocletian separated and enlarged the empire's civil and military services and reorganized the empire's provincial divisions, establishing the largest and most bureaucratic government in the history of the empire. He established new administrative centers in Nicomedia , Mediolanum , Sirmium , and Trevorum , closer to
14964-643: The empire. Diocletian refused and fought a battle with them, but was unable to secure a complete victory. The nomadic pressures of the European Plain remained and could not be solved by a single war; soon the Sarmatians would have to be fought again. Diocletian wintered in Nicomedia . There may have been a revolt in the eastern provinces at this time, as he brought settlers from Asia to populate emptied farmlands in Thrace . He visited Syria Palaestina
15136-437: The empire. Nonetheless, Ardashir I further expanded his new empire to the east and northwest, conquering the provinces of Sakastan , Gorgan , Khorasan , Marw (in modern Turkmenistan ), Balkh and Chorasmia . He also added Bahrain and Mosul to the Sassanid possessions. Later Sassanid inscriptions also claim the submission of the kings of Kushan , Turan and Makuran to Ardashir, although based on numismatic evidence it
15308-400: The entire crowd turned to face Constantine. It was not to be: Severus II and Maximinus II were declared caesars. Maximinus appeared and took Diocletian's robes. On the same day, Severus received his robes from Maximian in Milan. Constantius succeeded Maximian as Augustus of the West, but Constantine and Maxentius were entirely ignored in the transition of power. This did not bode well for
15480-480: The few instances during the Late Empire in which an emperor admitted a privatus as his colleague) and by creating senior senators Vettius Aquilinus and Junius Maximus ordinary consuls for the following year – for Maximus, it was his second consulship. If Diocletian did enter Rome shortly after his accession, he did not stay long; he is attested back in the Balkans by 2 November 285, on campaign against
15652-462: The first. Galerius left the city for Rome, declaring Nicomedia unsafe. Diocletian would soon follow. Although further persecutory edicts followed, compelling the arrest of the Christian clergy and universal acts of sacrifice, they were ultimately unsuccessful; most Christians escaped punishment, and pagans too were generally unsympathetic to the persecution. The martyrs ' sufferings strengthened
15824-568: The five satrapies between the Tigris and Armenia: Ingilene , Sophanene ( Sophene ), Arzanene ( Aghdznik ), Corduene (Carduene), and Zabdicene (near modern Hakkâri , Turkey). These regions included the passage of the Tigris through the Anti-Taurus range; the Bitlis pass, the quickest southerly route into Persian Armenia; and access to the Tur Abdin plateau. A stretch of land containing
15996-413: The following spring, His stay in the East saw diplomatic success in the conflict with Persia: in 287, Bahram II granted him precious gifts, declared open friendship with the Empire, and invited Diocletian to visit him. Roman sources insist that the act was entirely voluntary. Around the same time, perhaps in 287, Persia relinquished claims on Armenia and recognized Roman authority over territory to
16168-581: The following winter and spring. He campaigned successfully against the Sarmatians in 294, probably in the autumn. The Sarmatians' defeat kept them from the Danube provinces for a long time. Meanwhile, Diocletian built forts north of the Danube, part of a new defensive line called the Ripa Samartica , at Aquincum ( Budapest , Hungary ), Bononia ( Vidin , Bulgaria), Ulcisia Vetera, Castra Florentium, Intercisa ( Dunaújváros , Hungary), and Onagrinum ( Begeč , Serbia). In 295 and 296 Diocletian campaigned in
16340-567: The former's disadvantage: the rugged Armenian terrain was favourable to Roman infantry, but not to Sassanid cavalry. Local aid gave Galerius the advantage of surprise over the Persian forces, and, in two successive battles, Galerius secured victories over Narseh. During the second encounter, Roman forces seized Narseh's camp, his treasury, his harem, and his wife. Galerius advanced into Media and Adiabene , winning successive victories, most prominently near Erzurum , and securing Nisibis ( Nusaybin , Turkey) before 1 October 298. He then advanced down
16512-568: The frequency of their incursions. No details survive for these events. Some of the princes of these states were Persian client kings, a disturbing fact for the Romans in light of increasing tensions with the Sassanids. In the West, Maximian lost the fleet built in 288 and 289, probably in the early spring of 290. The panegyrist who refers to the loss suggests that its cause was a storm, but this might have been an attempt to conceal an embarrassing military defeat. Diocletian broke off his tour of
16684-493: The frontiers to act as guardians against invaders. He was tolerant of all religions, though he decreed that Zoroastrianism should be the official state religion , and was not unduly disturbed when one of his sons became a Christian. After Khosrow I, Hormizd IV (579–590) took the throne. The war with the Byzantines continued to rage intensely but inconclusively until the general Bahram Chobin , dismissed and humiliated by Hormizd, rose in revolt in 589. The following year, Hormizd
16856-499: The future security of the tetrarchic system. Diocletian retired to his homeland, Dalmatia . He moved into the expansive Diocletian's Palace , a heavily fortified compound located by the small town of Spalatum on the shores of the Adriatic Sea , and near the large provincial administrative center of Salona . The palace is preserved in great part to this day and forms the historic core of Split , modern-day Croatia , where it
17028-421: The future. The haruspices were unable to read the entrails of the sacrificed animals and blamed Christians in the Imperial household. The emperors ordered all members of the court to perform a sacrifice to purify the palace. The emperors sent letters to the military command, demanding the entire army perform the required sacrifices or face discharge. Diocletian was conservative in matters of religion, faithful to
17200-452: The hands of Maxentius. He ordered Maximian, who had attempted to return to power after his retirement, to step down permanently. At Carnuntum people begged Diocletian to return to the throne, to resolve the conflicts that had arisen through Constantine's rise to power and Maxentius's usurpation. Diocletian's reply: "If you could show the cabbage that I planted with my own hands to your emperor, he definitely wouldn't dare suggest that I replace
17372-465: The head of a large army granted to him by the Hephthalite king, returned to the empire's capital. Jamasp stepped down from his position and returned the throne to his brother. No further mention of Jamasp is made after the restoration of Kavad I, but it is widely believed that he was treated favourably at the court of his brother. The second golden era began after the second reign of Kavad I. With
17544-472: The household guard, had already defected to Diocletian in the early spring. When the Battle of the Margus began, Carinus' prefect Aristobulus also defected. In the course of the battle, Carinus was killed by his own men. Following Diocletian's victory, both the western and the eastern armies acclaimed him as Emperor. Diocletian exacted an oath of allegiance from the defeated army and departed for Italy. Diocletian may have become involved in battles against
17716-502: The kingdom. Peroz tried again to drive out the Hephthalites, but on the way to Balkh his army was trapped by the Huns in the desert. Peroz was defeated and killed by a Hephthalite army near Balkh. His army was completely destroyed, and his body was never found. Four of his sons and brothers had also died. The main Sasanian cities of the eastern region of Khorasan − Nishapur , Herat and Marw were now under Hephthalite rule. Sukhra ,
17888-499: The lands delivered to Tiridates in the peace of 287. He moved south into Roman Mesopotamia in 297, where he inflicted a severe defeat on Galerius in the region between Carrhae ( Harran , Turkey) and Callinicum ( Raqqa , Syria), suggested by the historian Fergus Millar to have been somewhere on the Balikh River . Diocletian may or may not have been present at the battle, but he quickly divested himself of all responsibility. In
18060-465: The later strategic strongholds of Amida ( Diyarbakır , Turkey) and Bezabde came under firm Roman military occupation. With these territories, Rome would have an advance station north of Ctesiphon, and would be able to slow any future advance of Persian forces through the region. Many cities east of the Tigris came under Roman control, including Tigranokert , Saird , Martyropolis , Balalesa , Moxos , Daudia , and Arzan – though under what status
18232-471: The legitimate Emperor in the West. Numerian lingered in the East. The Roman withdrawal from Persia was orderly and unopposed. The Sassanid king Bahram II could not field an army against them as he was still struggling to establish his authority. By March 284, Numerian had only reached Emesa (Homs) in Syria ; by November, only Asia Minor. In Emesa he was apparently still alive and in good health: he issued
18404-447: The light of the sun and swore an oath disclaiming responsibility for Numerian's death. He asserted that Aper had killed Numerian and concealed it. In full view of the army, Diocles drew his sword and killed Aper. Soon after Aper's death, Diocles changed his name to the more Latinate "Diocletianus" – in full, Gaius Valerius Diocletianus. After his accession, Diocletian and Lucius Caesonius Bassus were named as consuls and assumed
18576-542: The long-standing collaboration between the empire's senatorial and military aristocracies. It also tied his success to that of the Senate, whose support he would need in his advance on Rome. Diocletian was not the only challenger to Carinus' rule; the usurper Julianus , Carinus' corrector Venetiae , took control of northern Italy and Pannonia after Diocletian's accession. Julianus minted coins from Siscia ( Sisak , Croatia) declaring himself emperor and promising freedom. This aided Diocletian in his portrayal of Carinus as
18748-567: The man he had put in charge of operations against Saxon and Frankish pirates on the Saxon Shore , had, according to literary sources, begun keeping the goods seized from the pirates for himself. Maximian issued a death warrant for his larcenous subordinate. Carausius fled the Continent, proclaimed himself emperor, and agitated Britain and northwestern Gaul into open revolt against Maximian and Diocletian. Far more probable, according to
18920-576: The modern-day city of Split in Croatia. Diocletian was born in Dalmatia , probably at or near the town of Salona (modern Solin , Croatia ), to which he retired later in life. His original name was Diocles (in full, Gaius Valerius Diocles), possibly derived from Dioclea, the name of both his mother and her supposed place of birth . Diocletian's official birthday was 22 December, and his year of birth has been estimated at between 242 and 245 based on
19092-757: The name Diocletianus. The title was also claimed by Carus's surviving son, Carinus , but Diocletian defeated him in the Battle of the Margus . Diocletian's reign stabilized the empire and ended the Crisis of the Third Century . He appointed fellow officer Maximian as Augustus , co-emperor, in 286. Diocletian reigned in the Eastern Empire , and Maximian reigned in the Western Empire . Diocletian delegated further on 1 March 293, appointing Galerius and Constantius as junior colleagues (each with
19264-642: The neighbouring Roman Empire . It was founded by Ardashir I , a ruler who rose to power as Parthia weakened amidst internal strife and the Roman–Persian Wars . After defeating Artabanus IV of Parthia during the Battle of Hormozdgan in 224, Ardashir's dynasty replaced that of the Arsacids and promptly set out to restore the legacy of the Achaemenid Empire by expanding the newly acquired Sasanian dominions. At its greatest territorial extent,
19436-491: The news in Nicomedia ( İzmit ) in November. Numerian's generals and tribunes called a council for the succession, and chose Diocles as Emperor, in spite of Aper's attempts to garner support. On 20 November 284, the army of the east gathered on a hill 5 kilometres (3.1 mi) outside Nicomedia. The army unanimously saluted Diocles as their new Augustus , and he accepted the purple imperial vestments. He raised his sword to
19608-402: The nomad King Grumbates , started his second campaign against the Romans in 359 and soon succeeded in retaking Singara and Amida. In response the Roman emperor Julian struck deep into Persian territory and defeated Shapur's forces at Ctesiphon . He failed to take the capital, however, and was killed while trying to retreat to Roman territory. His successor Jovian , trapped on the east bank of
19780-484: The north and Sistan in the south while capturing lands from Gorgan to Abarshahr, Marw, and as far east as Balkh . Ardashir I's son Shapur I continued the expansion of the empire, conquering Bactria and the western portion of the Kushan Empire, while leading several campaigns against Rome. Invading Roman Mesopotamia , Shapur I captured Carrhae and Nisibis , but in 243 the Roman general Timesitheus defeated
19952-512: The now defunct Parthian Empire. At that time the Arsacid dynasty was divided between supporters of Artabanus IV and Vologases VI , which probably allowed Ardashir to consolidate his authority in the south with little or no interference from the Parthians. Ardashir was aided by the geography of the province of Fars, which was separated from the rest of Iran. Crowned in 224 at Ctesiphon as
20124-426: The offensive in 298 with an attack on northern Mesopotamia via Armenia. It is unclear if Diocletian was present to assist the campaign; he might have returned to Egypt or Syria. Narseh retreated to Armenia to fight Galerius's force, putting himself at a disadvantage; the rugged Armenian terrain was favorable to Roman infantry, but not to Sassanid cavalry. In two battles, Galerius won major victories over Narseh. During
20296-402: The office of caesar. The same day, in either Philippopolis ( Plovdiv , Bulgaria ) or Sirmium, Diocletian did the same for Galerius , husband to Diocletian's daughter Valeria, and perhaps Diocletian's praetorian prefect. Constantius was assigned Gaul and Britain. Galerius was initially assigned Syria, Palestine, Egypt, and responsibility for the eastern borderlands. This arrangement is called
20468-403: The only adult sons of reigning emperors, who had long been preparing to succeed their fathers, would be granted the title of Caesar . Constantine had travelled through Palestine at the right hand of Diocletian, and was present at the palace in Nicomedia in 303 and 305. It is likely that Maxentius received the same treatment. In Lactantius's account, when Diocletian announced that he was to resign,
20640-555: The only extant rescript in his name there, but after he left the city, his staff, including the prefect (Numerian's father-in-law and the dominant influence in his entourage) Aper , reported that he suffered from an inflammation of the eyes. He traveled in a closed coach from then on. When the army reached Bithynia , some of the soldiers smelled an odor emanating from the coach. They opened its curtains and found Numerian dead. Both Eutropius and Aurelius Victor describe Numerian's death as an assassination. Aper officially broke
20812-555: The panegyric detailing the ceremony implied that the true center of the empire was not Rome, but where the emperor sat ("...the capital of the empire appeared to be there, where the two emperors met"), it simply echoed what had already been stated by the historian Herodian in the early third century: "Rome is where the emperor is". During the meeting, decisions on matters of politics and war were probably made in secret. The Augusti would not meet again until 303. Some time after his return, and before 293, Diocletian transferred command of
20984-631: The part of an aristocratic ruler, not a monarchic one. On 20 December 303, Diocletian cut short his stay in Rome and left for the north. He did not even perform the ceremonies investing him with his ninth consulate; he did them in Ravenna on 1 January 304 instead. There are suggestions in the Panegyrici Latini and Lactantius's account that Diocletian arranged plans for his and Maximian's future retirement of power in Rome. Maximian, according to these accounts, swore to uphold Diocletian's plan in
21156-606: The peace and happiness of this place with the storms of a never-satisfied greed." Diocletian lived for four more years, spending his days in his palace gardens. He saw his tetrarchic system fail, torn apart by the civil wars of his successors . He heard of Maximian's third claim to the throne, his forced suicide, and his damnatio memoriae . In his own palace, statues and portraits of his former companion emperor were torn down and destroyed. After an illness, Diocletian died on 3 December 311, with some proposing that he took his own life in despair. Diocletian saw his work as that of
21328-417: The petty landholding nobility who were the backbone of later Sassanid provincial administration and the tax collection system. Khosrow I built infrastructure, embellishing his capital and founding new towns with the construction of new buildings. He rebuilt the canals and restocked the farms destroyed in the wars. He built strong fortifications at the passes and placed subject tribes in carefully chosen towns on
21500-916: The plinths found their way to the Boboli Gardens in Florence. Other fragments from the Antonine period, reused by Diocletian , were included in the rear facade of the cardinal's Villa Medici in Rome. More recently excavations carried out in 1923–1933 discovered further fragments now in the Centrale Montemartini . [REDACTED] Media related to Arcus Novus at Wikimedia Commons Diocletian Diocletian ( / ˌ d aɪ . ə ˈ k l iː ʃ ən / DYE -ə- KLEE -shən ; Latin : Gaius Aurelius Valerius Diocletianus ; Ancient Greek : Διοκλητιανός , romanized : Diokletianós ; 242/245 – 311/312), nicknamed Jovius ,
21672-419: The proconsulate of Africa and the post of urban prefect for 295. The other figures who retained their offices might have also betrayed Carinus. The assassinations of Aurelian and Probus demonstrated that sole rulership was dangerous to the stability of the empire. Conflict boiled in every province, from Gaul to Syria, Egypt to the lower Danube. It was too much for one person to control, and Diocletian needed
21844-445: The protests of his other brothers, who were put to death, Ardashir declared himself ruler of Pars. Once Ardashir was appointed shah (king), he moved his capital further to the south of Pars and founded Ardashir-Khwarrah (formerly Gur , modern day Firuzabad ). The city, well protected by high mountains and easily defensible due to the narrow passes that approached it, became the center of Ardashir's efforts to gain more power. It
22016-438: The provincial governor of Pars . Papak and his eldest son Shapur managed to expand their power over all of Pars. Subsequent events are unclear due to the elusive nature of the sources. It is certain that following the death of Papak, Ardashir, the governor of Darabgerd , became involved in a power struggle with his elder brother Shapur. Sources reveal that Shapur was killed when the roof of a building collapsed on him. By 208, over
22188-448: The region again, and won a victory over the Carpi in the summer of 296. Later during both 299 and 302, as Diocletian was residing in the East, it was Galerius's turn to campaign victoriously on the Danube. By the end of his reign, Diocletian had secured the entire length of the Danube, provided it with forts, bridgeheads, highways, and walled towns, and sent fifteen or more legions to patrol the region; an inscription at Sexaginta Prista on
22360-400: The resolve of their fellow Christians. Constantius and Maximian did not apply the later edicts, and left the Christians of the West unharmed. Galerius rescinded the edict in 311, announcing that the persecution had failed to bring Christians back to traditional religion. The temporary apostasy of some Christians, and the surrendering of scriptures, during the persecution played a major role in
22532-415: The resurgent Sarmatians. No details survive, but surviving inscriptions indicate that Diocletian took the title Sarmaticus Maximus after 289. In the East, Diocletian engaged in diplomacy with desert tribes in the regions between Rome and Persia. He might have been attempting to persuade them to ally themselves with Rome, thus reviving the old, Rome-friendly, Palmyrene sphere of influence , or to reduce
22704-571: The rich should divide their wives and their wealth with the poor. By adopting the doctrine of the Mazdakites, his intention evidently was to break the influence of the magnates and the growing aristocracy. These reforms led to his being deposed and imprisoned in the Castle of Oblivion in Khuzestan , and his younger brother Jamasp (Zamaspes) became king in 496. Kavad, however, quickly escaped and
22876-520: The rogue commander, so in 287 he campaigned against tribes beyond the Rhine instead. As Carausius was allied to the Franks, Maximian's campaigns could be seen as an effort to deny him a basis of support on the mainland. The following spring, as Maximian prepared a fleet for an expedition against Carausius, Diocletian returned from the East to meet Maximian. The two emperors agreed on a joint campaign against
23048-420: The same to Maximian at Sirmium. Scholars doubt Lactantius' account, since he had a strong bias against Galerius and probably attempted to villainize him. On 1 May 305, Diocletian called an assembly of his generals, traditional companion troops, and representatives from distant legions. They met at the same hill, 5 kilometres (3.1 mi) out of Nicomedia, where Diocletian had been proclaimed emperor. In front of
23220-586: The second longest-lived Persian imperial dynasty after the directly preceding Arsacid dynasty of Parthia . It fell to the Rashidun Caliphate during the early Muslim conquests , which marked the beginning of a monumental societal shift by initiating the Islamization of Iran . Upon succeeding the Parthians, the Sasanian dynasty re-established the Persian nation as a major power in late antiquity , and also continued to compete extensively with
23392-488: The site has been located between the Mons Aureus (Seone, west of Smederevo ) and Viminacium , near modern Belgrade , Serbia. Despite having a stronger, more powerful army, Carinus held the weaker position. His rule was unpopular, and it was later alleged that he had mistreated the Senate and seduced his officers' wives. It is possible that Flavius Constantius , the governor of Dalmatia and Diocletian's associate in
23564-403: The sole ruler of Persia, Ardashir took the title shahanshah , or "King of Kings" (the inscriptions mention Adhur-Anahid as his Banbishnan banbishn , "Queen of Queens", but her relationship with Ardashir has not been fully established), bringing the 400-year-old Parthian Empire to an end, and beginning four centuries of Sassanid rule. In the next few years, local rebellions occurred throughout
23736-483: The southern border, where the empire bordered the Arabs, in the year 300. This road would remain in use for centuries but proved ineffective in defending the border as conventional armies could not operate in the region. At the conclusion of the Peace of Nisibis , Diocletian and Galerius returned to Antioch . At some time in 299, the emperors took part in a ceremony of sacrifice and divination in an attempt to predict
23908-485: The spring of 299. The magister memoriae (secretary) of Diocletian and Galerius, Sicorius Probus, was sent to Narseh to present terms. The conditions of the resulting Peace of Nisibis were heavy: Armenia returned to Roman domination, with the fort of Ziatha as its border; Caucasian Iberia would pay allegiance to Rome under a Roman appointee; Nisibis, now under Roman rule, would become the sole conduit for trade between Persia and Rome; and Rome would exercise control over
24080-466: The subsequent Donatist controversy. Within twenty-five years of the persecution's inauguration, the Christian emperor Constantine would rule the empire alone. He would reverse the consequences of the edicts, and return all confiscated property to Christians. Under Constantine's rule, Christianity would become the empire's preferred religion. Diocletian was demonized by his Christian successors: Lactantius intimated that Diocletian's ascendancy heralded
24252-491: The support of the Hephthalites , Kavad launched a campaign against the Romans. In 502, he took Theodosiopolis in Armenia, but lost it soon afterwards. In 503 he took Amida on the Tigris. In 504, an invasion of Armenia by the western Huns from the Caucasus led to an armistice, the return of Amida to Roman control and a peace treaty in 506. In 521/522 Kavad lost control of Lazica , whose rulers switched their allegiance to
24424-741: The term is first attested in the trilingual Great Inscription of Shapur I , where the king says "I am the lord of the Empire of the Iranians". More commonly, as the ruling dynasty was named after Sasan , the empire is known as the Sasanian Empire in historical and academic sources. This term is also recorded in English as the Sassanian Empire , the Sasanid Empire , and the Sassanid Empire . Conflicting accounts shroud
24596-457: The tetrarchs themselves. Sasanian Empire The Sasanian Empire ( / s ə ˈ s ɑː n i ə n , s ə ˈ s eɪ n i ə n / ), officially Ērānšahr ( Middle Persian : 𐭠𐭩𐭥𐭠𐭭𐭱𐭲𐭥𐭩 , lit. ' Empire of the Iranians ' ), was the last pre-Islamic Iranian empire . Named after the House of Sasan , it endured for over four centuries, from 224 to 651, making it
24768-593: The three Augusti"; on the other side, it showed Carausius together with Diocletian and Maximian, with the caption CARAVSIVS ET FRATRES SVI, "Carausius & his brothers". However, Diocletian could not allow a breakaway regional usurper following in Postumus 's footprints to enter, of his own accord, the imperial college. Spurred by the crisis, on 1 April 286, Maximian took up the title of Augustus (emperor). Unusually, Diocletian could not have been present to witness it. It has even been suggested that Maximian usurped
24940-531: The title Caesar ), under himself and Maximian respectively. Under the Tetrarchy , or "rule of four", each tetrarch would rule over a quarter-division of the empire. Diocletian secured the empire's borders and purged it of all threats to his power. He defeated the Sarmatians and Carpi during several campaigns between 285 and 299, the Alamanni in 288, and usurpers in Egypt between 297 and 298. Galerius, aided by Diocletian, campaigned successfully against Persia ,
25112-467: The title and was only later recognized by Diocletian in hopes of avoiding civil war. This suggestion is unpopular, as it is clear that Diocletian meant for Maximian to act with a certain amount of independence. It may be posited that Diocletian felt the need to bind Maximian closer to him, by making him his empowered associate, to avoid the possibility of him striking some sort of deal with Carausius. Maximian realized that he could not immediately suppress
25284-415: The traditional Roman pantheon and understanding of demands for religious purification, but Eusebius , Lactantius and Constantine state that it was Galerius , not Diocletian, who was the prime supporter of the purge. Galerius, even more devoted and passionate than Diocletian, saw political advantage in the persecution. He was willing to break with a government policy of inaction on the issue. Antioch
25456-469: The two empires to focus on military matters elsewhere: Khosrow focused on the Sassanid Empire's eastern frontier while Maurice restored Byzantine control of the Balkans . Circa 600, the Hephthalites had been raiding the Sassanid Empire as far as Spahan in central Iran. The Hephthalites issued numerous coins imitating the coinage of Khosrow II. In c. 606/607 , Khosrow recalled Smbat IV Bagratuni from Persian Armenia and sent him to Iran to repel
25628-652: The two tribes received an annual gold stipend. Diocletian left Africa quickly after the treaty, moving from Upper Egypt in September 298 to Syria in February 299. He met with Galerius in Mesopotamia. In 294, Narseh , a son of Shapur who had been passed over for the Sassanid succession, came to power in Persia. In early 294, Narseh sent Diocletian the customary package of gifts between the empires, and Diocletian responded with an exchange of ambassadors. Within Persia, Narseh
25800-404: The war against Carausius from Maximian to Flavius Constantius , who concluded it successfully in 296. Constantius was a former governor of Dalmatia and a man of military experience stretching back to Aurelian 's campaigns against Zenobia (272–73). He was Maximian's praetorian prefect in Gaul, and the husband to Maximian's daughter, Theodora . On 1 March 293 at Milan, Maximian gave Constantius
25972-590: The war resumed but remained confined to Lazica, which was retained by the Byzantines when peace was concluded in 562. In 565, Justinian I died and was succeeded by Justin II (565–578), who resolved to stop subsidies to Arab chieftains to restrain them from raiding Byzantine territory in Syria. A year earlier, the Sassanid governor of Armenia, Chihor-Vishnasp of the Suren family, built a fire temple at Dvin near modern Yerevan , and he put to death an influential member of
26144-494: The war, defeated the Romans at Barbalissos (253), and then probably took and plundered Antioch . Roman counter-attacks under the emperor Valerian ended in disaster when the Roman army was defeated and besieged at Edessa and Valerian was captured by Shapur, remaining his prisoner for the rest of his life. Shapur celebrated his victory by carving the impressive rock reliefs in Naqsh-e Rostam and Bishapur , as well as
26316-520: The west and south of the Tigris. The western portion of Armenia was incorporated into the empire and made a province. Tiridates III , the Arsacid claimant to the Armenian throne and a Roman client, had been disinherited and forced to take refuge in the empire after the Persian conquest of 252–53. In 287, he returned to lay claim to the eastern half of his ancestral domain and encountered no opposition. Bahram II's gifts were widely recognized as symbolic of
26488-600: Was Dux Moesiae , a commander of forces on the lower Danube . The often-unreliable Historia Augusta states that he served in Gaul , but this is not corroborated by other sources and is ignored by modern historians. The first time Diocletian's whereabouts are accurately established was in 282 when the Emperor Carus made him commander of the Protectores domestici , the elite cavalry force directly attached to
26660-519: Was Roman emperor from 284 until his abdication in 305. He was born Diocles to a family of low status in the Roman province of Dalmatia . Diocles rose through the ranks of the military early in his career, eventually becoming a cavalry commander for the army of Emperor Carus . After the deaths of Carus and his son Numerian on a campaign in Persia , Diocles was proclaimed emperor by the troops, taking
26832-535: Was Diocletian's primary residence from 299 to 302, while Galerius swapped places with his Augustus on the Middle and Lower Danube. Diocletian visited Egypt once, over the winter of 301–2, and issued a grain dole in Alexandria. Following some public disputes with Manicheans , Diocletian ordered that the leading followers of Mani be burnt alive along with their scriptures. In a 31 March 302 rescript from Alexandria, he declared that low-status Manicheans must be executed by
27004-554: Was also amenable to the wishes of the Zoroastrian priesthood. During his reign, the Sassanid capital Ctesiphon was sacked by the Romans under Emperor Carus , and most of Armenia, after half a century of Persian rule, was ceded to Diocletian . Succeeding Bahram III (who ruled briefly in 293), Narseh embarked on another war with the Romans. After an early success against the Emperor Galerius near Callinicum on
27176-419: Was crowned in utero : the crown was placed upon his mother's stomach. During his youth the empire was controlled by his mother and the nobles. Upon coming of age, Shapur II assumed power and quickly proved to be an active and effective ruler. He first led his small but disciplined army south against the Arabs, whom he defeated, securing the southern areas of the empire. He then began his first campaign against
27348-443: Was defeated at the Battle of Dara . In the same year, a second Persian army under Mihr-Mihroe was defeated at Satala by Roman forces under Sittas and Dorotheus, but in 531 a Persian army accompanied by a Lakhmid contingent under Al-Mundhir III defeated Belisarius at the Battle of Callinicum , and in 532 an "eternal peace" was concluded. Kavad succeeded in restoring order in the interior and fought with general success against
27520-654: Was designated a World Heritage Site by UNESCO in 1979. Maximian retired to villas in Campania or Lucania . Their homes were distant from political life, but Diocletian and Maximian were close enough to remain in regular contact with each other. Galerius assumed the consular fasces in 308 with Diocletian as his colleague. In the autumn of 308, Galerius again conferred with Diocletian at Carnuntum ( Petronell-Carnuntum , Austria ). Diocletian and Maximian were both present on 11 November 308, to see Galerius appoint Licinius to be Augustus in place of Severus, who had died at
27692-483: Was destroying every trace of his immediate predecessors from public monuments. He sought to identify himself with the warlike kings Ardashir I (r. 226–241) and Shapur I (r. 241–272), who had defeated and imprisoned Emperor Valerian (r. 253–260) following his failed invasion of the Sasanian Empire . Narseh declared war on Rome in 295 or 296. He appears to have first invaded western Armenia, where he seized
27864-446: Was found. Executions followed anyway, and the palace eunuchs Dorotheus and Gorgonius were executed. One individual, Peter Cubicularius , was stripped, raised high, and scourged. Salt and vinegar were poured in his wounds, and he was slowly boiled over an open flame. The executions continued until at least 24 April 303, when six individuals, including the bishop Anthimus , were decapitated . A second fire occurred sixteen days after
28036-452: Was given refuge by the Hephthalite king. Jamasp (496–498) was installed on the Sasanian throne upon the deposition of Kavad I by members of the nobility. He was a good and kind king; he reduced taxes in order to improve the condition of the peasants and the poor. He was also an adherent of the mainstream Zoroastrian religion, diversions from which had cost Kavad I his throne and freedom. Jamasp's reign soon ended, however, when Kavad I, at
28208-619: Was in a less comfortable position than most of his predecessors, as he had a daughter, Valeria, but no sons. His co-ruler had to be from outside his family, raising the question of trust. Some historians state that Diocletian adopted Maximian as his filius Augusti , his "Augustan son", upon his appointment to the throne, following the precedent of some previous Emperors. This argument has not been universally accepted. Diocletian and Maximian added each other's nomina (their family name , "Valerius" and "Aurelius", respectively) to their own, thus creating an artificial family link and becoming part of
28380-556: Was killed by his brother Peroz in 459. At the beginning of the 5th century, the Hephthalites (White Huns), along with other nomadic groups, attacked Iran. At first Bahram V and Yazdegerd II inflicted decisive defeats against them and drove them back eastward. The Huns returned at the end of the 5th century and defeated Peroz I (457–484) in 483. Following this victory, the Huns invaded and plundered parts of eastern Iran continually for two years. They exacted heavy tribute for some years thereafter. These attacks brought instability and chaos to
28552-491: Was overthrown by a palace coup and his son Khosrow II (590–628) placed on the throne. However, this change of ruler failed to placate Bahram, who defeated Khosrow, forcing him to flee to Byzantine territory, and seized the throne for himself as Bahram VI. Khosrow asked the Byzantine Emperor Maurice (582–602) for assistance against Bahram, offering to cede the western Caucasus to the Byzantines. To cement
28724-469: Was perverted and minimized in the service of the theme of the tetrarchs as "restorers". Aurelian's achievements were ignored, the revolt of Carausius was backdated to the reign of Gallienus, and it was implied that the tetrarchs engineered Aurelian's defeat of the Palmyrenes ; the period between Gallienus and Diocletian was effectively erased. The history of the empire before the tetrarchy was portrayed as
28896-494: Was returned to Roman domination, with the fort of Ziatha as its border; Caucasian Iberia would pay allegiance to Rome under a Roman appointee; Nisibis, now under Roman rule, would become the sole conduit for trade between Persia and Rome; and Rome would exercise control over the five satrapies between the Tigris and Armenia: Ingilene , Sophanene ( Sophene ), Arzanene ( Aghdznik ), Corduene , and Zabdicene (near modern Hakkâri , Turkey). The Sassanids ceded five provinces west of
29068-564: Was standardized, made more equitable, and levied at generally higher rates. Not all of Diocletian's plans were successful: the Edict on Maximum Prices (301), his attempt to curb inflation via price controls , was counterproductive and quickly ignored. Although effective while he ruled, Diocletian's tetrarchic system collapsed after his abdication under the competing dynastic claims of Maxentius and Constantine, sons of Maximian and Constantius respectively. The Diocletianic Persecution (303–312),
29240-573: Was still alive. When Diocletian reappeared in public on 1 March 305, he was emaciated and barely recognizable. Galerius arrived in the city later in March. According to Lactantius , he came armed with plans to reconstitute the Tetrarchy, force Diocletian to step down, and fill the Imperial office with men compliant to his will. Through coercion and threats, he eventually convinced Diocletian to comply with his plan. Lactantius also claims that he had done
29412-419: Was surrounded by a high, circular wall, probably copied from that of Darabgerd. Ardashir's palace was on the north side of the city; remains of it are extant. After establishing his rule over Pars, Ardashir rapidly extended his territory, demanding fealty from the local princes of Fars, and gaining control over the neighbouring provinces of Kerman , Isfahan , Susiana and Mesene . This expansion quickly came to
29584-576: Was to be later confirmed by the Nvarsak Treaty (484). At the beginning of his reign in 441, Yazdegerd II assembled an army of soldiers from various nations, including his Indian allies, and attacked the Byzantine Empire , but peace was soon restored after some small-scale fighting. He then gathered his forces in Nishapur in 443 and launched a prolonged campaign against the Kidarites . After
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