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149-516: Publius Licinius Egnatius Gallienus ( / ˌ ɡ æ l i ˈ ɛ n ə s / ; c.  218 – September 268) was Roman emperor with his father Valerian from 253 to 260 and alone from 260 to 268. He ruled during the Crisis of the Third Century that nearly caused the collapse of the empire. He won numerous military victories against usurpers and Germanic tribes, but was unable to prevent

298-608: A theocracy . According to George Ostrogorsky , "the absolute power of the Roman emperor was further increased with the advent of Christian ideas". This became more evident after the Muslim conquests of the 7th century, which gave Byzantine imperialism a new sense of purpose. The emperor was the subject of a series of rites and ceremonies, including a formal coronation performed by the Patriarch of Constantinople . The Byzantine state

447-519: A 50-year period that almost saw the end of the Roman Empire. The last vestiges of Republicanism were lost in the ensuing anarchy. In 238, the Senate attempted to regain power by proclaiming Pupienus and Balbinus as their own emperors (the first time since Nerva ). They managed to usurp power from Maximinus Thrax , but they were killed within two months. With the rise of the "soldier emperors",

596-483: A civil war and Valerian's larger force, mutinied. They killed Aemilian at Spoletium or at the Sanguinarium bridge, between Oriculum and Narnia (halfway between Spoletium and Rome), and recognized Valerian as the new emperor. After Aemilian's death, which happened between late July and mid-September, a damnatio memoriae against him was declared. The 4th-century Chronograph of 354 records that he ruled

745-546: A court title bestowed to prominent figures of the government, and lost even more relevance after the creation of the title sebastokrator by Alexios I Komnenos . Despite this, its regular use by earlier emperors led to the name becoming synonym with "emperor" in certain regions. Several countries use Caesar as the origin of their word for "emperor", like Kaiser in Germany and Tsar in Bulgaria and Russia . After

894-503: A failed usurper when they say that he was from an insignificant family, John of Antioch may refer to Aemilian's propaganda when he says that the usurper used his ancestry to take power. His praenomen and nomen , reinforced by his cognomen , suggest a descent from a native African who obtained Roman citizenship during the Second Triumvirate , in which his land was ruled by Lepidus . Aemilian married Cornelia Supera ,

1043-544: A family name ( nomen ), styling himself as Imp. Caesar instead of Imp. Julius Caesar . However, the nomen was still inherited by women (such as Julia the Younger ) and appear in some inscriptions. After the death of Caligula , Augustus' great-grandson, his uncle Claudius was proclaimed emperor. He was not an official member of the Julia gens , but he was the grandson of Octavia , Augustus' sister, and thus still part of

1192-496: A general in command of troops on the banks of the Rhine, defeated some raiders and took possession of their spoils. Instead of returning it to the original owners, he preferred to distribute it amongst his soldiers. When news of this reached Silvanus, he demanded the spoils be sent to him. Postumus made a show of submission, but his soldiers mutinied and proclaimed him emperor. Under his command, they besieged Cologne, and after some weeks

1341-511: A naval expedition. The decisive battle probably took place near Thebes , and the result was a clear defeat of Aemilianus. In the aftermath, Gallienus became Consul three more times in 262, 264, and 266. In the years 267–269, Goths and other barbarians invaded the empire in great numbers. Sources are extremely confused on the dating of these invasions, the participants, and their targets. Modern historians are not even able to discern with certainty whether there were two or more of these invasions or

1490-473: A new caesar . Each pair ruled over a half of the Empire, which led to the creation of a Western and Eastern Roman Empire , a division that eventually became permanent. This division had already a precedent in the joint rule of Valerian / Gallienus and Carus / Carinus . Diocletian justified his rule not by military power, but by claiming divine right . He imitated Oriental divine kingship and encouraged

1639-565: A recognition of the property of the Church. However, the edict did not turn Christianity into an official religion. Gallienus was played by Franco Cobianchi in the 1964 film The Magnificent Gladiator . Roman emperor The legitimacy of an emperor's rule depended on his control of the Roman army and recognition by the Senate ; an emperor would normally be proclaimed by his troops, or by

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1788-541: A regime in which the notion of legitimacy is as absent as that of the Augustan principate". Imperial propaganda was often used to legitimize or de-legitimize certain emperors. The Chronicon Paschale , for example, describes Licinius as having been killed like "those who had briefly been usurpers before him". In reality, Licinius was the legitimate emperor of the West (having been appointed by Galerius ), while Constantine

1937-532: A result of a new revolt. The rebel this time was the prefect of Egypt, Lucius Mussius Aemilianus , who had already given support to the revolt of the Macriani. The correspondence of bishop Dionysius of Alexandria provides a commentary on the background of invasion, civil war, plague, and famine that characterized this age. Knowing he could not afford to lose control of the vital Egyptian granaries, Gallienus sent his general Theodotus against Aemilianus, probably by

2086-584: A single prolonged one. It seems that, at first, a major naval expedition was led by the Heruli starting from north of the Black Sea and leading to the ravaging of many cities of Greece (among them, Athens and Sparta ). Then another, even more numerous army of invaders started a second naval invasion of the empire. The Romans defeated the barbarians on sea first. Gallienus's army then won a battle in Thrace , and

2235-491: A total of 88 days (the same number as Florianus ). Aemilianus' sole reign was one of the shortest in Rome's history, as he only ruled about a month between Trebonianus Gallus' death and his own murder. It is possible that the usurper Silbannacus was an officer left by Aemilian in Rome before moving against Valerian, who later tried to become emperor but then was killed. The life and troubled administration of emperor Aemilian

2384-526: A woman of African origin; the year of their marriage is unknown, but since both were from the same place, it is possible they married before Aemilian left Africa. During the reign of Trebonianus Gallus and his son Volusianus (251–253), Aemilian was sent to the Balkans to command an army. His primary responsibility was to assure peace along the Danube frontier, which had been subject to several attacks by

2533-430: Is hard to fix the precise date of these events), probably due to the vacuum left by the withdrawal of troops supporting Gallienus in the campaign against Ingenuus. Franks broke through the lower Rhine, invading Gaul , some reaching as far as southern Spain, sacking Tarraco (modern Tarragona ). The Alemanni invaded, probably through Agri Decumates (an area between the upper Rhine and the upper Danube), likely followed by

2682-561: Is known as the Dominate , derived from the title dominus ("lord") adopted by Diocletian . During his rule, the emperor became an absolute ruler and the regime became even more monarchical. The emperors adopted the diadem crown as their supreme symbol of power, abandoning the subtleties of the early Empire. Beginning in the late 2nd century, the Empire began to suffer a series of political and economic crises, partially because it had overexpanded so much. The Pax Romana ("Roman peace")

2831-598: Is never used. The imperial titles are treated as inseparable of the person, which is reflected in the name Imperator Caesar Vespasianus Augustus . This Lex sometimes related to the Lex regia ("royal law") mentioned in the Corpus Juris Civilis of Eastern emperor Justinian I (r. 527–565), who cites the early 3rd-century writer Ulpian . This was probably a later construct, as its very name, which derives from rex ("king"), would have been utterly rejected in

2980-518: Is often said to have ended with the tyrannical reign of Commodus. His murder was followed by the accession of Septimius Severus , the victor of the Year of the Five Emperors . It was during his reign that the role of the army grew even more, and the emperors' power increasingly depended on it. The murder of his last relative, Severus Alexander , led to the Crisis of the Third Century (235–285),

3129-467: Is often said to have followed a " Caesaropapist " model, where the emperor played the role of ruler and head of the Church, but there was often a clear distinction between political and secular power. The line of Eastern emperors continued uninterrupted until the sack of Constantinople and the establishment of the Latin Empire in 1204. This led to the creation of three lines of emperors in exile:

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3278-519: Is still often regarded as a usurper, similarly to Magnus Maximus , who was briefly recognized by Theodosius I . Western emperors such as Magnentius , Eugenius and Magnus Maximus are sometimes called usurpers, but Romulus Augustulus is traditionally regarded as the last Western emperor, despite never receiving the recognition of the Eastern emperor Zeno . The period after the Principate

3427-577: Is thought to be located to the south of Rome, at the IXth mile of the Via Appia . Gallienus was not treated favorably by ancient historians. The biased and largely fictional account of that reign in the Historia Augusta describes him as a lover of luxury, who dressed in purple, sprinkled gold dust in his hair, and built castles of apples. Emperor Julian's The Caesars presents Gallienus "with

3576-399: The pomerium ; and use discretionary power whenever necessary. The text further states that he is "not bound by laws", and that any previous act was retroactively considered legitimate. There is no mention of imperium nor tribunicia potestas , although these powers were probably given in the earlier clauses. There is also no mention of any "imperial office", and the title of "emperor"

3725-510: The Battle of Interamna Nahars in August 253, only to be killed by his own men a month later when another general, Valerian , proclaimed himself emperor and moved against Aemilian with a larger army. Aemilian was born in the Roman province of Africa . According to the 4th century source Epitome de Caesaribus , he was born at Girba (modern Djerba , an island off the coast of Tunisia ) and

3874-635: The Constantinian dynasty , emperors followed Imperator Caesar with Flavius , which also began as a family name but was later incorporated into the emperor's titles, thus becoming Imperator Caesar Flavius . The last use of the formula, rendered as Autokrator Kaisar Flabios... Augoustos (Αὐτοκράτωρ καῖσαρ Φλάβιος αὐγουστος) in Greek, is in the Basilika of Leo VI the Wise (r. 886–912). Originally

4023-537: The Egnatii . Gallienus married Cornelia Salonina about ten years before his accession to the throne. She was the mother of three princes: Valerian II , who died in 258; Saloninus , who was named co-emperor but was murdered in 260 by the army of general Postumus; and Marinianus , who was killed in 268, shortly after his father was assassinated. When Valerian was proclaimed emperor in September 253, he asked

4172-583: The Epitome de Caesaribus report that he was about 50 years old at the time of his death, meaning he was born around 218. He was the son of Emperor Valerian and Mariniana , who may have been of senatorial rank, possibly the daughter of Egnatius Victor Marinianus , and his brother was Valerianus Minor . Inscriptions on coins connect him with Falerii in Etruria , which may have been his birthplace; it has yielded many inscriptions relating to his mother's family,

4321-531: The Goths led by king Cniva . Gallus secured the throne after the death of Emperor Decius at the hands of Cniva in the Battle of Abrittus (251), and later had to manage an outbreak of plague that devastated Rome. He was not popular with the army, mainly due to humiliating treaties signed in 251 with the Goths and King Shapur I of Persia who attacked Syria . According to John of Antioch, upon his appointment to

4470-580: The Historia Augusta . At first they met no opposition. The Pannonian legions joined the invaders, being resentful of the absence of Gallienus. He sent his successful commander Aureolus against the rebels, however, and the decisive battle was fought in the spring or early summer of 261, most likely in Illyricum, although Zonaras locates it in Pannonia. In any case, the army of the usurpers was defeated and surrendered, and their two leaders were killed. In

4619-536: The Juthungi . After devastating Germania Superior and Raetia (parts of southern France and Switzerland ), they entered Italy, the first invasion of the Italian peninsula, aside from its most remote northern regions, since Hannibal 500 years before. When invaders reached the outskirts of Rome, they were repelled by an improvised army assembled by the Senate, consisting of local troops (probably praetorian guards) and

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4768-755: The Lava Treasure in Corsica , France, in the 1980s. He contributed to military history as the first to commission primarily cavalry units, the Comitatenses , that could be dispatched anywhere in the Empire in short order. This reform arguably created a precedent for the future emperors Diocletian and Constantine I . The biographer Aurelius Victor reports that Gallienus forbade senators from becoming military commanders. This policy undermined senatorial power, as more reliable equestrian commanders rose to prominence. In Southern's view, these reforms and

4917-528: The Papal States . Pepin's son, Charlemagne , was crowned Imperator Romanorum (the first time Imperator was used as an actual regnal title) by Pope Leo III in Christmas AD 800, thus ending the recognition of the Eastern emperor. Western rulers also began referring to the Empire as the "Greek Empire", regarding themselves as the true successors of Rome. The inhabitants of the Eastern half of

5066-477: The Roman Republic and was given to victorious commanders by their soldiers. They held imperium , that is, military authority. The Senate could then award the extraordinary honor of a triumph ; the commander then retained the title until the end of his magistracy . In Roman tradition, the first triumph was that of Romulus , the founder of Rome, but the first attested use of imperator was in 189 BC, on

5215-619: The Senate to ratify the elevation of Gallienus to Augustus . He was also designated consul ordinarius for 254. As Marcus Aurelius and his adopted brother Lucius Verus had done a century earlier, Gallienus and his father divided the Empire. Valerian left for the East to stem the Persian threat, and Gallienus remained in Italy to repel the Germanic tribes on the Rhine and Danube. Division of

5364-524: The Tetrarchy the powers of the caesar increased considerably, but following the accession of Constantine I it once more remained as a title for heirs with no significant power attached to it. The title slowly lost importance in the following decades, as emperors started to promote their sons directly to augustus . In the East, the title finally lost its imperial character in 705, when Justinian II awarded it to Tervel of Bulgaria . After this it became

5513-513: The de facto sole ruler of Rome in 48 BC, when he defeated his last opposition at the Battle of Pharsalus . His killers proclaimed themselves as the liberatores ("liberators") and the restorers of the Republic, but their rule was cut short by Caesar's supporters, who almost immediately established a new dictatorship. In his will, Caesar appointed his grandnephew Octavian as his heir and adopted son. He inherited his property and lineage,

5662-422: The emperors of Nicaea , the emperors of Trebizond , and the short-lived emperors of Thessalonica . The Nicean rulers have been traditionally regarded as the "legitimate" emperors of this period, as they recovered Constantinople and restored the Empire in 1261. The Empire of Trebizond continued to exist for another 200 years, but from 1282 onwards its rulers used the modified title of "Emperor and Autocrat of all

5811-682: The fall of the Western Roman Empire , as it was used by rulers such as Theodoric the Great . Aemilianus Marcus Aemilius Aemilianus ( c.  210 – September 253), also known as Aemilian , was Roman emperor for three months in 253. Commander of the Moesian troops, he obtained an important victory against the invading Goths and was, for this reason, acclaimed emperor by his army. He then moved quickly to Roman Italy , where he defeated Emperor Trebonianus Gallus at

5960-408: The proconsuls of the few senatorial provinces and allies such as Agrippa . The governors appointed to the imperial provinces only answered to the emperor himself, who could maintain or replace them at will. The tribunician power ( tribunicia potestas ), first assumed by Augustus in 23 BC, gave him authority over the tribune of the plebs without having to actually hold the office – a tribune

6109-519: The " Year of the Five Emperors ", but modern scholarship now identifies Clodius Albinus and Pescennius Niger as usurpers because they were not recognized by the Roman Senate . Recognition by the Senate is often used to determine the legitimacy of an emperor, but this criterion is not always followed. Maxentius is sometimes called an usurper because he did not have the recognition of Tetrarchs , but he held Rome for several years, and thus had

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6258-594: The "shadow emperor". In 476, the Heruli Odoacer overthrew the child-emperor Romulus Augustulus , made himself king of Italy and shipped the imperial regalia to the Emperor Zeno in Constantinople. Historians mark this date as the date of the fall of the Western Roman Empire , although by this time there was no longer any "Empire" left, as its territory had reduced to Italy. Julius Nepos , who

6407-573: The 5th century, there was scarcely a single decade without succession conflicts and civil war. During this period, very few emperors died of natural causes. Such problems persisted in the later Eastern Empire, where emperors had to often appoint co-emperors to secure the throne. Despite often working as a hereditary monarchy, there was no law or single principle of succession. Individuals who claimed imperial power "illegally" are referred to as " usurpers " in modern scholarship. Ancient historians refer to these rival emperors as " tyrants ". In reality, there

6556-532: The 9th century. Its last known use was on 866–867 coins of Michael III and his co-emperor Basil I , who are addressed as imperator and rex respectively. In the West, imperator was transformed into a monarchical title by Charlemagne , becoming the official Latin title of the Holy Roman Empire . Originally the cognomen (third name) of the dictator Gaius Julius Caesar , which was then inherited by Augustus and his relatives. Augustus used it as

6705-593: The Alps with their valuables and captives from Italy. A historian in the 19th century suggested that the initiative of the Senate gave rise to jealousy and suspicion by Gallienus, thus contributing to his exclusion of senators from military commands. Around the same time, Regalianus , who held some command in the Balkans, was proclaimed emperor. The reasons for this are unclear, and the Historia Augusta (almost

6854-520: The Dalmatians, spread the word that the forces of Aureolus were leaving the city, and Gallienus left his tent without his bodyguard, only to be struck down by Cecropius. One version has Claudius selected as emperor by the conspirators, another chosen by Gallienus on his death bed; the Historia Augusta was concerned to substantiate the descent of the Constantinian dynasty from Claudius, and this may explain its accounts, which do not involve Claudius in

7003-468: The Danube, most likely in 258. Ingenuus may have been responsible for Valerian II's death. Alternatively, the defeat and capture of Valerian at the battle of Edessa may have been the trigger for the subsequent revolts of Ingenuus, Regalianus , and Postumus . In any case, Gallienus reacted with great speed. He left his son Saloninus as Caesar at Cologne , under the supervision of Albanus (or Silvanus) and

7152-706: The East, the Iberians , and the Perateia ", accepting the Niceans as the sole Roman emperors. However, the Byzantine Empire had been reduced mostly to Constantinople, and the rise of other powers such as Serbia and Bulgaria forced the Byzantines to recognize their rulers as basileus . Despite this, emperors continued to view themselves as the rulers of an "universal empire". During the last decades of

7301-432: The Empire always saw the emperor as an open monarch. Starting with Heraclius in 629, Roman emperors styled themselves " basileus ", the traditional title for Greek monarchs used since the times of Alexander the Great . The title was used since the early days of the Empire and became the common imperial title by the 3rd century, but did not appear in official documents until the 7th century. Michael I Rangabe (r. 811–813)

7450-440: The Empire used it regularly. It began to used in official context starting with Septimius Severus , and was first officially adopted in coinage by Aurelian . In the East, imperator was translated as autokrator ("self-ruler"), a title that continued to be used until the end of the Empire. This is the modern Greek word for "emperor" ( υτοκράτορας ). There are still some instances of imperator in official documents as late as

7599-494: The Empire, power was once again shared between multiple emperors and colleagues, each ruling from their own capital, notably during the long reign of John V . Constantinople finally fell to the Ottoman Turks in 1453; its last emperor, Constantine XI Palaiologos , dying in battle. The last vestiges of the empire, Morea and Trebizond , fell in 1461. The title imperator – from imperare , "to command" – dates back to

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7748-516: The Empire, while later functioning as de facto separate entities, were always considered and seen, legally and politically, as separate administrative divisions of a single, insoluble state by the Romans of the time. In the West , the office of emperor soon degenerated into being little more than a puppet of Germanic generals such as Aetius and Ricimer ; the last emperors of the West being known as

7897-603: The English translation of the Latin imperator , then Julius Caesar had been an emperor, like several Roman generals before him. Instead, by the end of the Caesar's civil wars , it became clear that there was certainly no consensus to return to the old-style monarchy , but that the period when several officials would fight one another had come to an end. Julius Caesar, and then Augustus after him, accumulated offices and titles of

8046-421: The Goths by surprise, killing most of them, followed by an invasion of Goth territory resulting in booty and the liberation of prisoners. The Roman soldiers, gathered by Aemilian, acclaimed him emperor. Jordanes claims, however, that Aemilian's troops plundered Roman territory, rather than keep the tribute of the Goths. With his few men, Aemilian left his province unguarded and moved quickly towards Rome to meet

8195-535: The Moesian command, Aemilian was already envious of Gallus and plotted treachery against him. He was also an opponent of the Roman Senate , and his seditious plans are confirmed by Jerome and Jordanes . In 253, the Goths , led by king Cniva , claimed they had not received the tribute due from the Romans according to the treaty of 251. They crossed the border and attacked Cappadocia , Pessinus , and Ephesus . Modern historians believe that this missing payment

8344-515: The Republic, Diocletian established at the top of this new structure the Tetrarchy ("rule of four") in an attempt to provide for smoother succession and greater continuity of government. Under the Tetrarchy, Diocletian set in place a system of two emperors ( augusti ) and two subordinates that also served as heirs ( caesares ). When an emperor retired (as Diocletian and Maximian did in 305) or died, his caesar would succeed him and in turn appoint

8493-512: The Rhine provinces in 257, he remained behind on the Danube as the personification of Imperial authority. Sometime between 258 and 260 (the exact date is unclear), while Valerian was distracted with the ongoing invasion of Shapur I in the East, and Gallienus was preoccupied with his problems in the West, Ingenuus , governor of at least one of the Pannonian provinces, took advantage and declared himself emperor. Valerian II had apparently died on

8642-421: The Roman state as an autocrat , but he failed to create a stable system to maintain himself in power. His rise to power was the result of a long and gradual decline in which the Republic fell under the influence of powerful generals such as Marius and Sulla . At the end of the Republic no new, and certainly no single, title indicated the individual who held supreme power. Insofar as emperor could be seen as

8791-443: The Roman world among them. Lepidus was sidelined in 36 BC, and relations between Octavian and Antony soon deteriorated. In September 31 BC, Octavian's victory at Actium put an end to any effective opposition and confirmed his supremacy over Rome. In January 27 BC, Octavian and the Senate concluded the so-called " First settlement ". Until then Octavian had been ruling the state with his powers as triumvir , even though

8940-479: The Senate awarded him the appellation of augustus ("elevated"). The honorific itself held no legal meaning, but it denoted that Octavian (henceforth Augustus ) now approached divinity, and its adoption by his successors made it the de facto main title of the emperor. He also received the civic crown alongside several other insignias in his honor. Augustus now held supreme and indisputable power, and even though he still received subsequent grants of powers, such as

9089-455: The Senate, of which he considered himself a general. Aemilian received the titles of Pius , Felix and Pater Patriae , the tribunicia potestas , and was elevated to the rank of pontifex maximus ; he was not, however, elevated to consulate (possibly a hint of his non-senatorial birth). His coinage shows that his propaganda focused on his capability as a military commander—he defeated the Goths when nobody thought this possible, and thus he

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9238-434: The Senate, or both. The first emperors reigned alone; later emperors would sometimes rule with co-emperors to secure the succession or to divide the administration of the empire between them. The office of emperor was thought to be distinct from that of a rex ('king'). Augustus, the first emperor, resolutely refused recognition as a monarch. For the first three hundred years of Roman emperors, efforts were made to portray

9387-464: The Triumvirate itself disappeared years earlier. He announced that he would return the power to the Senate and People of Rome , but this was only an act. The Senate confirmed Octavian as princeps , the " first among equals ", and gave him control over almost all Roman provinces for a tenure of ten years. This limitation was only superficial, as he could renew his powers indefinitely. In addition,

9536-505: The West acknowledged the Eastern emperors until the accession of Empress Irene in 797. After this, the papacy created a rival lineage of Roman emperors in western Europe, the Holy Roman Emperors , which ruled the Holy Roman Empire for most of the period between 800 and 1806. These emperors were never recognized in Constantinople and their coronations resulted in the medieval problem of two emperors . The last Eastern emperor

9685-569: The West remaining after the death of Julius Nepos in 480. Instead the Eastern emperor Zeno proclaimed himself as the sole emperor of a theoretically undivided Roman Empire (although in practice he had no authority in the West). The subsequent Eastern emperors ruling from Constantinople styled themselves as " Basileus of the Romans" ( Ancient Greek : βασιλεύς Ῥωμαίων , Basileus Romaíon ) but are often referred to in modern scholarship as Byzantine emperors . The papacy and Germanic kingdoms of

9834-423: The West. The Eastern Greek-speaking half of the Empire had always regarded the emperors as open monarchs ( basileis ), and called them as such. The weakest point of the Augustan institution was its lack of a clear succession system. Formally announcing a successor would have revealed Augustus as a monarch, so he and subsequent emperors opted to adopt their best candidates as their sons and heirs. Primogeniture

9983-704: The adoptive son of the long-deceased Marcus Aurelius , hence why he named Caracalla after him. Later Eastern imperial dynasties, such as the Doukai and Palaiologoi , claimed descent from Constantine the Great . What turns a "usurper" into a "legitimate" emperor is typically that they managed to gain the recognition of a more senior, legitimate, emperor, or that they managed to defeat a more senior, legitimate emperor and seize power. Modern historiography has not yet defined clear legitimacy criteria for emperors, resulting in some emperors being included or excluded from different lists. The year 193 has traditionally been called

10132-491: The aftermath of the battle, the rebellion of Postumus had already started, so Gallienus had no time to deal with the rest of the usurpers, namely Balista and Quietus. He came to an agreement with Odenathus, who had just returned from his victorious Persian expedition. Odenathus received the title of dux Romanorum and besieged the usurpers, who were based at Emesa . Eventually, the people of Emesa killed Quietus, and Odenathus arrested and executed Balista about November 261. After

10281-601: The army and the bureaucracy, so the principle of automatic inheritance was not adopted, which often led to several claimants to the throne . Despite this, elements of the republican institutional framework (Senate, consuls, and magistrates) were preserved even after the end of the Western Empire. Constantine the Great , the first Christian emperor, moved the capital from Rome to Constantinople , formerly known as Byzantium , in 330 AD. Roman emperors had always held high religious offices; under Constantine there arose

10430-474: The authority based on prestige. The honorific was awarded as both a name and a title to Octavian in 27 BC and was inherited by all subsequent emperors, who placed it after their personal names. The only emperor to not immediately assume it was Vitellius , although he did use it after his recognition by the Senate. Later emperors ruled alongside one or several junior augusti who held de jure (but not de facto ) equal constitutional power. Despite its use as

10579-476: The city and Senate of Rome began to lose importance. Maximinus and Carus , for example, did not even set foot on the city. Carus' successors Carinus and Numerian , the last of the Crisis emperors, did not bother to assume the tribunicia potestas either. After reuniting the Roman Empire in 285, Diocletian began a series of reforms to restore stability. Reaching back to the oldest traditions of job-sharing in

10728-481: The city of Sirmium . There is a suggestion that Gallienus invited the Roxolani to attack Regalianus, but other historians dismiss the accusation. It is also suggested that the invasion was finally checked by Gallienus near Verona and that he directed the restoration of the province, probably in person. In the East, Valerian was confronted with serious troubles. Bands of " Scythai " began a naval raid of Pontus , in

10877-457: The clash. The two armies met at the Battle of Interamna Nahars near modern Terni , at the southern end of the eastern branch of the Flaminia, and Aemilian won the battle; Gallus and Volusianus fled to the north with a few followers, probably as a delay tactic before the arrival of reinforcements, but, in late June or early August 253, at Forum Flaminii (modern San Giovanni Profiamma ), on

11026-400: The continuance of the Republic. The title had already been used by Pompey and Julius Caesar , among others. It was a purely honorific title with no attached duties or powers, hence why it was never used in official titulature. The title was the most preferred by Augustus as its use implies only "primacy" (is in the " first among equals "), as opposed to dominus , which implies dominance. It

11175-549: The creation of a worship cult . Augustus became pontifex maximus (the chief priest of the College of Pontiffs ) in 12 BC, after the death of the former triumvir Lepidus . Emperors from the reign of Gratian (r. 375–383) onward used the style pontifex inclytus ("honorable pontiff"). The title of pontifex maximus was eventually adopted by the bishops of Rome during the Renaissance . The last known emperors to use

11324-519: The decline in senatorial influence not only helped Aurelian to salvage the Empire, but they also make Gallienus one of the emperors most responsible for the creation of the Dominate , along with Septimius Severus , Diocletian, and Constantine I. The capture of Valerian in the year 259 forced Gallienus to issue the first official declaration of tolerance with regard to the Christians, restoring their places of worship and cemeteries, therefore implying

11473-516: The defeat at Edessa, Gallienus lost control over the provinces of Britain, Spain, parts of Germania, and a large part of Gaul when another general, Postumus , declared his own realm (usually known today as the Gallic Empire ). The revolt partially coincided with that of Macrianus in the East. Gallienus had installed his son Saloninus and his guardian, Silvanus , in Cologne in 258. Postumus,

11622-473: The defenders of the city opened the gates and handed Saloninus and Silvanus to Postumus, who had them killed. The dating of these events was long uncertain, but an inscription discovered in 1992 at Augsburg indicates that Postumus had been proclaimed emperor by September 260. Postumus claimed the consulship for himself and one of his associates, Honoratianus, but according to D.S. Potter, he never tried to unseat Gallienus or invade Italy. Upon receiving news of

11771-419: The dress and languishing gait of a woman", which is possibly connected with coins portraying the emperor with unusual iconography and bearing the legend Gallienae Augustae . This animosity within the sources was partly due to the secession of Gaul and Palmyra and his inability to win them back; at the time of Gallienus's death, Palmyra was still nominally loyal to Rome, but, under the leadership of Odaenathus ,

11920-442: The early spring of 260. The Roman army was defeated at the Battle of Edessa , and Valerian was taken prisoner. Shapur's army raided Cilicia and Cappadocia (in present-day Turkey ), sacking, as Shapur's inscriptions claim, 36 cities. It took a rally by an officer named Callistus (Balista), a fiscal official named Fulvius Macrianus , the remnants of the Roman army in the east, and Odenathus and his Palmyrene horsemen to turn

12069-617: The emperor derived from an extraordinary concentration of individual powers and offices that were extant in the Republic and developed under Augustus and later rulers, rather than from a new political office. Under the Republic, these powers would have been split between several people, who would each exercise them with the assistance of a colleague and for a specific period of time. Augustus held them all at once by himself, and with no time limits; even those that nominally had time limits were automatically renewed whenever they lapsed. The Republican offices endured and emperors were regularly elected to

12218-477: The emperor pursued the invaders. According to some historians, he was the leader of the army who won the great Battle of Naissus , while the majority believes that the victory must be attributed to his successor, Claudius II . In 268, at some time before or soon after the battle of Naissus, the authority of Gallienus was challenged by Aureolus , commander of the cavalry stationed in Mediolanum ( Milan ), who

12367-453: The emperors as leaders of the Republic, fearing any association with the kings who ruled Rome prior to the Republic. From Diocletian , whose reformed tetrarchy divided the position into one emperor in the West and one in the East , emperors ruled in an openly monarchic style. Although succession was generally hereditary, it was only hereditary if there was a suitable candidate acceptable to

12516-400: The empire had become necessary due to its sheer size and the numerous threats it faced, and it facilitated negotiations with enemies who demanded to communicate directly with the emperor. Gallienus spent most of his time in the provinces of the Rhine area ( Germania Inferior , Germania Superior , Raetia , and Noricum ), though he almost certainly visited the Danube area and Illyricum in

12665-413: The end of the Empire. In the West, the title was also used by Charlemagne and the subsequent Holy Roman Emperors as part of the formula Imperator Augustus . Both Eastern and Western rulers also used the style semper augustus ("forever augustus"). The word princeps , meaning "first", was a republican term used to denote the leading member of the Senate, and it was used by the early emperors to emphasize

12814-441: The failure of the Tetrarchy. This practice had first been applied by Septimius Severus , who proclaimed his 10-year-old son Caracalla as augustus . He was followed by Macrinus , who did the same with his 9-year-old son Diadumenian , and several other emperors during the Crisis. This became even more common from the 4th century onwards. Gratian was proclaimed emperor at the age of 8, and his co-ruler and successor Valentinian II

12963-500: The family. Following the suicide of Nero, the last descendant of Caesar, the new emperor Galba adopted the name of Servius Galba Caesar Augustus , thus making it part of the imperial title. Five days before his murder he adopted Piso Licinianus as his son and heir, renaming him as Servius Sulpicius Galba Caesar . After this Caesar came to denote the heir apparent, who would add the name to his own as heir and retain it upon accession as augustus . The only emperor not to assume it

13112-412: The first emperor, whereas Julius Caesar is considered the last dictator of the Roman Republic , a view that is shared by the Roman writers Plutarch , Tacitus , and Cassius Dio . Conversely, the majority of Roman writers, including Pliny the Younger , Suetonius and Appian , as well as most of the ordinary people of the Empire, thought of Julius Caesar as the first emperor. Caesar did indeed rule

13261-444: The formation of the breakaway Gallic Empire under general Postumus . Aureolus , another usurper, proclaimed himself emperor in Mediolanum in 268 but was defeated outside the city by Gallienus and besieged inside. While the siege was ongoing, Gallienus was assassinated, stabbed to death by the officer Cecropius, as part of a conspiracy. The exact birth date of Gallienus is unknown. The 6th-century Greek chronicler John Malalas and

13410-417: The granting of tribunicia potestas in 23 BC, these were only ratifications of the powers he already possessed. Most modern historians use 27 BC as the start date of the Roman Empire. This is mostly a symbolic date, as the Republic had essentially disappeared many years earlier. Ancient writers often ignore the legal implications of Augustus' reforms and simply write that he "ruled" Rome following

13559-414: The highest imperial title, it was generally not used to indicate the office of Emperor itself, as ordinary people and writers had become accustomed to Imperator . In the East the title was initially translated as Sebastos , but the form Augoustos eventually became more common. Emperors after Heraclius styled themselves as Basileus , but Augoustos still remained in use in a lesser form up until

13708-445: The highest importance in the Republic, making the power attached to those offices permanent, and preventing anyone with similar aspirations from accumulating or maintaining power for themselves. Julius Caesar had been pontifex maximus since 64 BC; held the offices of consul and dictator five times since 59 BC, and was appointed dictator in perpetuity in 44 BC, shortly before his assassination . He had also become

13857-461: The hostile Latin tradition attributes success to him at this time. In 255 or 257, Gallienus was made consul again, suggesting that he briefly visited Rome on those occasions, although no record survives. During his Danube sojourn (Drinkwater suggests in 255 or 256), he proclaimed his elder son Valerian II Caesar and thus official heir to himself and Valerian I; the boy probably joined Gallienus on campaign at that time, and when Gallienus moved west to

14006-546: The legitimate emperor, Gallus, before the latter could receive reinforcements. While Aemilian descended upon Rome along the Flaminian Way , Gallus and Volusianus had him proclaimed "enemy of the State" by the Roman senate, then exited Rome to meet the usurper. This strategy suggests that Aemilian's army was smaller than theirs, as they probably did not expect reinforcements to come in time but trusted their larger army to win

14155-399: The loyalty of most of his allies, and – again through a formal process of senatorial consent – an increasing number of the titles and offices that had accrued to Caesar. In August 43 BC, following the death of both consuls of the year , Octavian marched to Rome and forced the Senate to elect him consul. He then formed the Second Triumvirate alongside Mark Antony and Lepidus , dividing

14304-421: The main title of the emperor. According to Suetonius , it was "not merely a new title but a more honorable one, inasmuch as sacred places too, and those in which anything is consecrated by augural rites are called "august" ( augusta ), from the increase ( auctus ) in dignity". It was also connected to the religious practice of augury , which was itself linked to Rome's founding by Romulus , and to auctoritas ,

14453-472: The marginalization of the former heartland of Italy to the empire had a profound cultural impact on the empire and its emperor, which adopted a more Hellenistic character. The Eastern emperors continued to be recognized in the Western kingdoms until the accession of Irene (r. 797–802), the first empress regnant . The Italian heartland was recovered during the reign of Justinian I (r. 527–565), but this

14602-476: The military leadership of Postumus. He then hastily crossed the Balkans , taking with him the new cavalry corps ( comitatus ) under the command of Aureolus and defeated Ingenuus at Mursa or Sirmium . Ingenuus was killed by his own guards or committed suicide by drowning himself after the fall of his capital, Sirmium. A major invasion by the Alemanni and other Germanic tribes occurred between 258 and 260 (it

14751-411: The most prominent of them: the consulship and censorship . This early period of the Empire is known as the " Principate ", derived from the title princeps used by the early emperors. The most important bases of the emperor's power were his supreme power of command ( imperium maius ) and tribunician power ( tribunicia potestas ) as personal qualities, separate from his public office. Originally,

14900-510: The murder of Caesar, or that he "ruled alone" after the death of Mark Antony. Most Romans thus simply saw the "emperor" as the individual that ruled the state, with no specific title or office attached to him. Augustus actively prepared his adopted son Tiberius to be his successor and pleaded his case to the Senate for inheritance on merit. After Augustus' death in AD ;14, the Senate confirmed Tiberius as princeps and proclaimed him as

15049-554: The murder of his son, Gallienus began gathering forces to face Postumus. The invasion of the Macriani forced him to dispatch Aureolus with a large force to oppose them, however, leaving him with insufficient troops to battle Postumus. After some initial defeats, the army of Aureolus, having defeated the Macriani, rejoined him, and Postumus was expelled. Aureolus was entrusted with the pursuit and deliberately allowed Postumus to escape and gather new forces. Gallienus returned in 263 or 265 and surrounded Postumus in an unnamed Gallic city. During

15198-467: The murder, but the sources agree that most of Gallienus's officials wanted him dead. According to the Historia Augusta, an unreliable source compiled long after the events it describes, a conspiracy was led by the commander of the guard Aurelius Heraclianus and Lucius Aurelius Marcianus . Marcianus's role in the conspiracy is not confirmed by any other ancient source. Cecropius, commander of

15347-486: The murder. The other sources ( Zosimus i.40 and Zonaras xii.25) report that the conspiracy was organized by Heraclianus, Claudius, and Aurelian . According to Aurelius Victor and Zonaras, on hearing the news that Gallienus was dead, the Senate in Rome ordered the execution of his family (including his brother Valerianus and son Marinianus) and their supporters, just before receiving a message from Claudius to spare their lives and deify his predecessor. The tomb of Gallienus

15496-447: The new augustus . Tiberius had already received imperium maius and tribunicia potestas in AD 4, becoming legally equal to Augustus but still subordinate to him in practice. The "imperial office" was thus not truly defined until the accession of Caligula , when all of Tiberius' powers were automatically transferred to him as a single, abstract position that was symbolized by his sacred title of augustus . The legal authority of

15645-496: The northern part of Asia Minor. After ravaging the province, they moved south into Cappadocia . A Roman army from Antioch, under Valerian, tried to intercept them but failed. According to Zosimus , this army was infected by a plague that gravely weakened it. In that condition, this army had to repel a new invasion of the province of Mesopotamia by Shapur I , ruler of the Sassanid Empire . The invasion occurred probably in

15794-410: The powers of command where divided in consular imperium for Rome and proconsular imperium for the provinces . This division became obsolete in 19 BC, when Augustus was given consular imperium – despite leaving the consulship in 23 BC – and thus control over all troops. This overwhelming power was referred to as imperium maius to indicate its superiority to other holders of imperium , such as

15943-448: The protectors of the Church. The territorial divisions of the Tetrarchy were maintained, and for most of the following century the Empire was ruled by two senior emperors, one in the West (with Milan and later Ravenna as capital) and another in the East (with Constantinople as capital). This division became permanent on the death of Theodosius I in 395, when he was succeeded by his sons Honorius and Arcadius . The two halves of

16092-440: The recognition of the Senate. Other "usurpers" controlled, if briefly, the city of Rome, such as Nepotianus and Priscus Attalus . In the East, the possession of Constantinople was the essential element of legitimacy, yet some figures such as Procopius are treated as usurpers. Rival emperors who later gained recognition are not always considered legitimate either; Vetranio had the formal recognition by Constantius II yet he

16241-406: The reverence of the emperor, making anything related to him sacer (sacred). He declared himself Jovius , the son of Jupiter , and his partner Maximian was declared Herculius , son of Hercules . This divine claim was maintained after the rise of Christianity, as emperors regarded themselves as the chosen rulers of God. The emperor no longer needed the Senate to ratify his powers, so he became

16390-410: The secession of important provinces. His 15-year reign was the longest in half a century. Born into a wealthy and traditional senatorial family, Gallienus was the son of Valerian and Mariniana . Valerian became Emperor in September 253 and had the Roman Senate elevate Gallienus to the rank of Augustus . Valerian divided the empire between him and his son, with Valerian ruling the east and his son

16539-469: The siege, Gallienus was severely wounded by an arrow and had to flee. The standstill persisted until his later death, and the Gallic Empire remained independent until 274. In 262, the mint in Alexandria started to again issue coins for Gallienus, demonstrating that Egypt had returned to his control after suppressing the revolt of the Macriani. In spring of 262, the city was wrenched by civil unrest as

16688-559: The sole resource for these events) does not provide a credible story. It is possible the seizure can be attributed to the discontent of the civilian and military provincials, who felt the defense of the province was being neglected. Regalianus held power for some six months and issued coins bearing his image. After some success against the Sarmatians , his revolt ended when the Roxolani invaded Pannonia and killed Regalianus in taking

16837-436: The sole source of law. These new laws were no longer shared publicly and were often given directly to the praetorian prefects – originally the emperor's bodyguard, but now the head of the new praetorian prefectures – or with private officials. The emperor's personal court and administration traveled alongside him, which further made the Senate's role redundant. Consuls continued to be appointed each year, but by this point, it

16986-496: The specifically Christian idea that the emperor was God's chosen ruler on earth, a special protector and leader of the Christian Church, a position later termed Caesaropapism . In practice, an emperor's authority on Church matters was frequently subject to challenge. The Western Roman Empire collapsed in the late 5th century after multiple invasions by Germanic barbarian tribes, with no recognised claimant to Emperor of

17135-521: The strongest of the civilian population. On their retreat through northern Italy, they were intercepted and defeated in the battle of Mediolanum (near present-day Milan ) by Gallienus's army, which had advanced from Gaul, or from the Balkans after dealing with the Franks. The battle of Mediolanum was decisive, and the Alemanni did not bother the empire for the next ten years. The Juthungi managed to cross

17284-476: The tide against Shapur. The Sassanids were driven back, but Macrianus proclaimed his two sons Quietus and Macrianus (sometimes misspelled Macrinus) as emperors. Coins struck for them in major cities of the East indicate acknowledgement of the usurpation. The two Macriani left Quietus, Ballista, and, presumably, Odenathus to deal with the Persians while they invaded Europe with an army of 30,000 men, according to

17433-418: The title continued to be used for a time, with emperors registering the number of times they were hailed imperator . The title became the main appellation of the ruler by the time of Vespasian . After the Tetrarchy , emperors began to be addressed as dominus noster ("our Lord"), although imperator continued to be used. The appellation of dominus was known and rejected by Augustus, but ordinary men of

17582-533: The title of caesar . The Senate still exercised some power during this period, as evidenced by his decision to declare Nero a "public enemy", and did influence in the succession of emperors. Following the murder of Domitian in AD 96, the Senate declared Nerva , one of their own, as the new emperor. His "dynasty", the Antonine , continued the adoptive system until the reign of Marcus Aurelius (r. 161–180). Marcus

17731-473: The title of consul was Constans II , who was also the last Eastern emperor to visit Rome. It's possible that later emperors also used it as an honorary title, as the office of consul was not abolished until 892, during the reign of Leo VI . During the Dominate it became increasingly common for emperors to raise their children directly to augustus (emperor) instead of caesar (heir), probably because of

17880-418: The title was Junius Blaesus in AD 22, after which it became a title reserved solely for the sovereign. Augustus used Imperator instead of his first name ( praenomen ), becoming Imperator Caesar instead of Caesar Imperator . From this the title slowly became a synonym of the office, hence the word "emperor". Tiberius , Caligula and Claudius avoided using the title, but it is recorded that Caligula

18029-545: The title were Valentinian III and Marcian , in the 5th century. The only surviving document to directly refer to the emperor's power is the Lex de imperio Vespasiani , written shortly after Vespasian 's formal accession in December 69. The text, of which only the second part survives, states that Vespasian is allowed to: make treaties; hold sessions and propose motions to the Senate; hold extraordinary sessions with legislative power; endorse candidates in elections; expand

18178-409: The tribunes, such as sacrosanctity , since 36 BC. With this powers, he could veto any act or proposal of any magistrate, propose laws and convoke the Senate. His sacrosanctity also made him untouchable, and any offence against him could be treated as a crime of treason. The tribunician power was arguably the most stable and important of the emperor's powers. Despite being a perpetual title, it

18327-514: The triumph of Aemilius Paulus . It was a title held with great pride: Pompey was hailed imperator more than once, as was Sulla and Julius Caesar . However, as noted by Cassius Dio , the meaning of the title changed under the new monarchy, and came to denote "the possession of the supreme power". Both Dio and Suetonius refer to Caesar as the first one to assume imperator as a proper name (a praenomen imperatoris ), but this seems to be an anachronism . The last ordinary general to be awarded

18476-507: The vague terms of "second" or "little emperor". Despite having a successful reign himself, Diocletian's tetrarchic system collapsed as soon as he retired in 305. Constantine I , the son of tetrarch Constantius I , reunited the empire in 324 and imposed the principle of hereditary succession which Diocletian intended to avoid. Constantine was also the first emperor to convert to Christianity , and emperors after him, especially after its officialization under Theodosius I , saw themselves as

18625-474: The west. Gallienus defeated the usurper Ingenuus in 258 and destroyed an Alemanni army at Mediolanum in 259. The defeat and capture of Valerian at Edessa in 260 by the Sasanian Empire threw the Roman Empire into the chaos of civil war. Control of the whole empire passed to Gallienus. He defeated the eastern usurpers Macrianus Major and Lucius Mussius Aemilianus in 261–262 but failed to stop

18774-469: The western branch of the Flaminia, they were killed by some of their own guards, who thought that their betrayal could earn them a reward. Aemilian continued towards Rome. The Roman senate, after a short opposition, decided to recognize him as emperor. According to some sources, Aemilian then wrote to the Senate, promising to fight for the Empire in Thrace and against Persia, and to relinquish his power to

18923-531: The years from 253 to 258. According to Eutropius and Aurelius Victor, he was particularly energetic and successful in preventing invaders from attacking the German provinces and Gaul, despite the weakness caused by Valerian's march on Italy against Aemilianus in 253. According to numismatic evidence, he seems to have won many victories there, and a victory in Roman Dacia might also be dated to that period. Even

19072-674: Was Constantine XI Palaiologos , who died during the Fall of Constantinople to the Ottoman Empire in 1453. After conquering the city, Ottoman sultans adopted the title " Caesar of the Romans" ( kayser-i Rûm ). A Byzantine group of claimant emperors existed in the Empire of Trebizond until its conquest by the Ottomans in 1461, although they had used a modified title since 1282. Modern historians conventionally regard Augustus as

19221-415: Was Vitellius , who adopted the name Germanicus instead. Most emperors used it as their nomen – with Imperator as their praenomen – until the reign of Antoninus Pius , when it permanently became part of the formula Imperator Caesar [full name] Augustus . In the 3rd century, caesars also received the honorific of nobilissimus ("most noble"), which later evolved into a separate title. During

19370-401: Was a Moor ; a reference in the same source hints that he was born around 207. The 12th-century historian Joannes Zonaras , who calls him a Libyan rather than a Moor, and another chronicle of the 13th century hold that he was forty at the time of his death in 253. Regarding his lineage, there are two versions, both exaggerated: while Eutropius and his translator Paeanius probably defame

19519-508: Was also used to distinguish a junior co-emperor ( basileus ) from his senior colleague ( basileus autokrator ). By the times of the Palaiologos , there were two distinct ceremonies for the accession of an emperor: first an acclamation as basileus , and later a coronation as autokrator (which also included being raised on a shield). These rites could happen years apart. The Eastern Empire became not only an absolute monarchy but also

19668-512: Was always renewed each year, which often coincided with the beginning of a new regnal year (although " regnal years " were not officially adopted until Justinian I ). The office of censor was not fully absorbed into the imperial office until the reign of Domitian , who declared himself "perpetual censor" ( censor perpetuus ) in AD 85. Before this, the title had been only used by Claudius (47), Vespasian and Titus (both in 73). The emperor also had power over religious affairs, which led to

19817-446: Was an office often occupied by the emperor himself, who now had complete control over the bureaucratic apparatus. Diocletian did preserve some Republican traditions, such as the tribunicia potestas . The last known emperor to have used it was Anastasius I , at the start of the 6th century. Anastasius was also the last attested emperor to use the traditional titles of proconsul and pater patriae . The last attested emperor to use

19966-401: Was by definition a plebeian , whereas Augustus, although born into a plebeian family, had become a patrician when he was adopted into the gens Julia . By adopting the role of a tribune, Augustus was presenting himself as the representative of the common man and the protector of democracy. As always, this was not a sudden grant of power; Augustus had been receiving several powers related to

20115-419: Was hailed imperator by the Senate on his accession, indicating that it was already considered an integral part of the dignity. It was not until the late reign of Nero , in AD 66, that imperator became once more part of the emperor's nomenclature. Virtually all emperors after him used the praenomen imperatoris , with only a few variations under his successors Galba and Vitellius . The original meaning of

20264-492: Was independent in nearly every other respect. Palmyra would formally secede after Odaenathus's death and the ascension of his widow Zenobia . It was not until the reign of Aurelian several years later that the breakaway provinces were truly brought back into the Roman fold. According to modern scholar Pat Southern, some historians now see Gallienus in a more positive light. Gallienus produced some useful reforms. About 40 rare gold coins of Gallienus have been discovered as part of

20413-426: Was no distinction between emperors and usurpers, as many emperors started as rebels and were retroactively recognized as legitimate. The Lex de imperio Vespasiani explicitly states that all of Vespasian's actions are considered legal even if they happened before his recognition by the Senate. Ultimately, "legitimacy was a post factum phenomenon." Theodor Mommsen famously argued that "here has probably never been

20562-407: Was not a change in Roman policy, and the Goths were more likely trying to capitalize on their military prowess. Aemilian had command of the army assigned to defend the area, but the recent defeat at the Battle of Abrittus put his troops on edge. Aemilian exhorted them, reminding them of Roman honor (according to Zosimus ) and promising tribute from the Goths (according to Zonaras ). The Romans took

20711-618: Was not relevant in the early Empire, although emperors still attempted to maintain a familiar connection between them; Tiberius , for example, married Julia the Elder , making him Augustus ' son-in-law. Vespasian , who took power after the collapse of the Julio-Claudian dynasty and the tumultuous Year of the Four Emperors , was the first emperor to openly declare his sons, Titus and Domitian , as his sole heirs, giving them

20860-407: Was overthrown and expelled to Dalmatia in favor of Romulus, continued to claim the title until his murder in 480. The Eastern court recognized this claim and Odoacer minted coins in his name, although he never managed to exercise real power. The death of Nepos left Zeno as the sole emperor of a (technically) reunited Roman Empire. The Roman Empire survived in the East for another 1000 years, but

21009-412: Was proclaimed emperor at the age of 4. Many child emperors such as Philip II or Diadumenian never succeeded their fathers. These co-emperors all had the same honors as their senior counterpart, but they did not share the actual government, hence why junior co-emperors are usually not counted as real emperors by modern or ancient historians. There was no title to denote the "junior" emperor; writers used

21158-413: Was replaced with dominus ("lord"); the use of princeps and dominus broadly symbolizes the differences in the empire's government, giving rise to the era designations Principate and Dominate . The title is still found in some later sources, however. The poet Claudian , for example, describes Honorius as having been raised from " caesar " to " princeps " (instead of augustus ). The title survived

21307-617: Was reverted by the end of the century. Rome technically remained under imperial control , but was completely surrounded by the Lombards . Africa was lost to the Arabs in the early 7th century, and Rome eventually fell to the Lombards in 751, during the reign of Constantine V . The Frankish king Pepin the Short defeated them and received the favour of Pope Stephen II , who became the head of

21456-408: Was supposed to keep an eye on Postumus . Instead, he acted as deputy to Postumus until the very last days of his revolt, when he seems to have claimed the throne for himself. The decisive battle took place at what is now Pontirolo Nuovo near Milan; Aureolus was clearly defeated and driven back to Milan. Gallienus laid siege to the city but was murdered during the siege. There are differing accounts of

21605-486: Was the first emperor to actually use the title of "Roman emperor" (βασιλεύς Ῥωμαίων, Basileus Romaíon ). This was a response to the new line of emperors created by Charlemagne – although he was recognized as basileus of the Franks . By the 9th century the full imperial title became " basileus and autokrator of the Romans", usually translated as "Emperor and Autocrat of the Romans". The title autokrator

21754-409: Was the first emperor to rule alongside other emperors, first with his adoptive brother Lucius Verus , who succeeded jointly with him, and later with his son Commodus , who was proclaimed co- augustus in 177. Despite being the son of a previous emperor and having nominally shared government with him, Commodus' rule ended with his murder at the hands of his own soldiers. From his death in 192 until

21903-602: Was the real "usurper" (having been proclaimed by his troops). There were no true objective legal criteria for being acclaimed emperor beyond acceptance by the Roman army , which was really the true basis of imperial power. Common methods used by emperors to assert claims of legitimacy, such as support of the army, blood connections (sometimes fictitious) to past emperors, distributing one's own coins or statues, and claims to pre-eminent virtue through propaganda, were pursued just as well by many usurpers as they were by legitimate emperors. Septimius Severus notably declared himself as

22052-437: Was the right man for the job of restoring the power of the Roman Empire. Valerian , governor of the Rhine provinces, was on his way south with an army which, according to Zosimus, had been called in as a reinforcement by Gallus. But modern historians believe this army, possibly mobilized for an incumbent campaign in the East, moved only after Gallus' death to support Valerian's bid for power. Emperor Aemilian's men, fearful of

22201-408: Was the title used by early writers before the term imperator became popular. In his Res Gestae , Augustus explicitly refers to himself as the princeps senatus . The title was also sometimes given to heirs, in the form of princeps iuventutis ("first of the youth"), a term that continued to be used during the Tetrarchy . In the era of Diocletian and beyond, princeps fell into disuse and

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