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97-661: Hellas Planitia / ˈ h ɛ l ə s p l ə ˈ n ɪ ʃ i ə / is a plain located within the huge, roughly circular impact basin Hellas located in the southern hemisphere of the planet Mars . Hellas is the third- or fourth-largest known impact crater in the Solar System . The basin floor is about 7,152 m (23,465 ft) deep, 3,000 m (9,800 ft) deeper than the Moon's South Pole-Aitken basin , and extends about 2,300 km (1,400 mi) east to west. It

194-482: A constitution and representative assembly . Despite the absolutism of Otto's reign, it proved instrumental in developing institutions which are still the bedrock of Greek administration and education. Reforms were taken in education, maritime and postal communications, effective civil administration and the legal code . Historical revisionism took the form of de- Byzantinification and de- Ottomanisation , in favour of promoting Ancient Greek heritage. The capital

291-567: A 16 cm (6.3 in) refractor , produced "the first really truthful representation of the planet" (in the estimation of E. M. Antoniadi ). Radar images by the Mars Reconnaissance Orbiter (MRO) spacecraft's SHARAD radar sounder suggest that features called lobate debris aprons in three craters in the eastern region of Hellas Planitia are actually glaciers of water ice lying buried beneath layers of dirt and rock. The buried ice in these craters as measured by SHARAD

388-501: A 2018 Forest Landscape Integrity Index mean score of 6.6/10, ranking it 70th globally out of 172 countries. In 2024, Greece became the first country in the European Union to ban bottom trawling in marine protected areas what should protect its marine biodiversity . Rare marine species such as the pinniped seals and the loggerhead sea turtle live in the seas surrounding mainland Greece, while its dense forests are home to

485-421: A combination of glacial action and explosive boiling may be responsible for gully features in the crater. Some of the low elevation outflow channels extend into Hellas from the volcanic Hadriacus Mons complex to the northeast, two of which Mars Orbiter Camera images show contain gullies: Dao Vallis and Reull Vallis . These gullies are also low enough for liquid water to be transient around Martian noon, if

582-552: A coup in 1967 by the Greek junta , led by Georgios Papadopoulos . Civil rights were suspended, political repression intensified, and human rights abuses, including torture, were rampant. Economic growth remained rapid before plateauing in 1972. The brutal suppression of the Athens Polytechnic uprising in 1973 set in motion the fall of the regime, resulting in a counter-coup that established brigadier Dimitrios Ioannidis as

679-529: A failed attempt to annex Crete from the Ottomans. He was replaced by Prince Wilhelm of Denmark, who took the name George I and brought with him the Ionian Islands as a coronation gift from Britain. A new Constitution in 1864 changed Greece's form of government from constitutional monarchy to the more democratic crowned republic . In 1875 parliamentary majority as a requirement for government

776-462: A population of over 10.4 million. Athens is the nation's capital and largest city , followed by Thessaloniki and Patras . Greece is considered the cradle of Western civilization , being the birthplace of democracy , Western philosophy , Western literature , historiography , political science , major scientific and mathematical principles, theatre , and the Olympic Games . From

873-719: A ruling minority. As a result, during the centuries that followed a vernacular form of Greek , known as koine , and Greek culture was spread , while the Greeks adopted Eastern deities and cults . Greek science, technology, and mathematics reached their peak during the Hellenistic period. Aspiring to maintain their autonomy and independence from the Antigonid kings of the Macedonians , many poleis of Greece united in koina or sympoliteiai i.e. federations, while after

970-773: A significant barrier to east–west travel. Its extensions cross through the Peloponnese, ending in the island of Crete. The Vikos Gorge , part of the Vikos-Aoos National Park in the Pindus range, is listed by the Guinness book of World Records as the deepest gorge in the world. Another notable formation are the Meteora rock pillars, atop which have been built medieval Greek Orthodox monasteries. Northeastern Greece features another high-altitude mountain range,

1067-512: A valley, a plain is enclosed on two sides, but in other cases a plain may be delineated by a complete or partial ring of hills, by mountains, or by cliffs . Where a geological region contains more than one plain, they may be connected by a pass (sometimes termed a gap ). Coastal plains mostly rise from sea level until they run into elevated features such as mountains or plateaus. Plains can be formed from flowing lava ; from deposition of sediment by water, ice, or wind; or formed by erosion by

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1164-496: Is 1,160 km (721 mi). The country lies approximately between latitudes 34° and 42° N , and longitudes 19° and 30° E , with the extreme points being: the village Ormenio in the North and the islands Gavdos (South), Strongyli near Kastellorizo /Megisti (East), and Othonoi (West). The island Gavdos is considered the southernmost island of Europe. Approximately 80% of Greece consists of mountains or hills, making

1261-408: Is a flat expanse of land with a layer of grass that generally does not change much in elevation , and is primarily treeless. Plains occur as lowlands along valleys or at the base of mountains , as coastal plains , and as plateaus or uplands . Plains are one of the major landforms on earth, where they are present on all continents, and cover more than one-third of the world's land area. In

1358-405: Is about 250 m (820 ft) thick on the upper crater and about 300 m (980 ft) and 450 m (1,480 ft) on the middle and lower levels respectively. Scientists believe that snow and ice accumulated on higher topography, flowed downhill, and is now protected from sublimation by a layer of rock debris and dust. Furrows and ridges on the surface were caused by deforming ice. Also,

1455-505: Is centered at 42°24′S 70°30′E  /  42.4°S 70.5°E  / -42.4; 70.5 . It features the lowest point on Mars , serves as a known source of global dust storms, and may have contained lakes and glaciers. Hellas Planitia spans the boundary between the Hellas quadrangle and the Noachis quadrangle . With a diameter of about 2,300 km (1,400 mi), it

1552-521: Is mere coincidence, is unknown. Due to its size and its light coloring, which contrasts with the rest of the planet, Hellas Planitia was one of the first Martian features discovered from Earth by telescope . Before Giovanni Schiaparelli gave it the name Hellas (which in Greek means Greece ), it was known as Lockyer Land , having been named by Richard Anthony Proctor in 1867 in honor of Sir  Joseph Norman Lockyer , an English astronomer who, using

1649-510: Is mostly found in archaic or poetic contexts today. The Greek adjectival form ελληνικός ( ellinikos , [eliniˈkos] ) is sometimes also translated as Hellenic and is often rendered in this way in the formal names of Greek institutions, as in the official name of the Greek state, the Hellenic Republic ( Ελληνική Δημοκρατία , [eliniˈci ðimokraˈti.a] ). The English names Greece and Greek are derived, via

1746-667: Is the largest unambiguous well-exposed impact structure on the planet; the obscured Utopia Planitia is slightly larger (the Borealis Basin , if it proves to be an impact crater, is considerably larger). Hellas Planitia is thought to have been formed during the Late Heavy Bombardment period of the Solar System , approximately 4.1 to 3.8 billion years ago, when a protoplanet or large asteroid, suggested to be around 370 kilometres (230 mi) in diameter, hit

1843-621: Is today the European Union in 1981 and is part of the eurozone . It is a member of other international institutions, including the Council of Europe , NATO (since 1952), the OECD , the WTO , and the OSCE . Greece has a unique cultural heritage, large tourism industry , and prominent shipping sector . The country's rich historical legacy is reflected in part by its 19 UNESCO World Heritage Sites . Greece

1940-1068: The Boreal Kingdom and is shared between the East Mediterranean province of the Mediterranean Region and the Illyrian province of the Circumboreal Region . According to the World Wide Fund for Nature and the European Environment Agency , the territory of Greece can be subdivided into six ecoregions : the Illyrian deciduous forests , Pindus Mountains mixed forests , Balkan mixed forests , Rhodope montane mixed forests , Aegean and Western Turkey sclerophyllous and mixed forests , and Crete Mediterranean forests . It had

2037-582: The Cyclades , as well as some areas in the north featuring a cold equivalent climate ( Köppen : BSk ), such as the cities of Thessaloniki and Larissa . The mountainous areas and the higher elevations of northwestern Greece (parts of Epirus , Central Greece , Thessaly , Western Macedonia ) as well as in the mountainous central parts of Peloponnese – including parts of the regional units of Achaea , Arcadia , and Laconia  – feature an Alpine climate ( Köppen : D , E ) with heavy snowfalls during

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2134-594: The Golden Age of Athens , a seminal period that laid many foundations of Western civilization. Lack of political unity resulted in frequent conflict between Greek states. The most devastating intra-Greek war was the Peloponnesian War (431–404 BC), which marked the demise of the Athenian Empire and the emergence of Spartan and later Theban hegemony . Weakened by constant wars among them during

2231-462: The Greek genocide (1914–22), when Ottoman and Turkish officials contributed to the death of several hundred thousand Asia Minor Greeks, along with similar numbers of Assyrians and a larger number of Armenians . The resultant Greek exodus from Asia Minor was made permanent, and expanded, in an official population exchange between Greece and Turkey , as part of the Treaty of Lausanne which ended

2328-508: The London Conference of 1832 , Britain, France and Russia installed Bavarian Prince Otto von Wittelsbach as monarch . Otto's reign was despotic , and in its first 11 years of independence Greece was ruled by a Bavarian oligarchy led by Josef Ludwig von Armansperg and, later, by Otto himself, as King and Premier. Greece remained under the influence of its three protecting great powers. In 1843 an uprising forced Otto to grant

2425-620: The Macedonian Struggle , which ended with the Young Turk Revolution in 1908. Amidst dissatisfaction with the seeming inertia and unattainability of national aspirations , military officers organised a coup in 1909 and called on Cretan politician Eleftherios Venizelos , who conveyed a vision of national regeneration. After winning two elections and becoming prime minister in 1910, Venizelos initiated fiscal, social, and constitutional reforms , reorganised

2522-639: The Persian Empire controlled the Greek city states in Asia Minor and Macedonia. Attempts by Greek city-states of Asia Minor to overthrow Persian rule failed , and Persia invaded the states of mainland Greece in 492 BC, but was forced to withdraw after defeat at the Battle of Marathon in 490 BC. In response, the Greek city-states formed the Hellenic League in 481 BC, led by Sparta , which

2619-508: The Rhodope range, spreading across the region of Eastern Macedonia and Thrace ; this area is covered with vast, thick, ancient forests, including the famous Dadia Forest in the Evros regional unit , in the far northeast of the country. Extensive plains are primarily located in the regions of Thessaly , Central Macedonia , and Thrace . They constitute key economic regions as they are among

2716-709: The Russian -instigated Orlov Revolt in 1770. These uprisings were put down by the Ottomans with great bloodshed. Many Greeks were conscripted as Ottoman subjects to serve in the Ottoman army and especially the navy, while the Ecumenical Patriarchate of Constantinople, responsible for the Orthodox, remained in general loyal to the Empire. In the 18th century, Greek merchants came to dominate trade within

2813-608: The Second Hellenic Republic declared. In 1935, a royalist general-turned-politician Georgios Kondylis took power after a coup and abolished the republic, holding a rigged referendum , after which King George II was restored to the throne. An agreement between Prime Minister Ioannis Metaxas and George II followed in 1936, which installed Metaxas as head of a dictatorship known as the 4th of August Regime , inaugurating authoritarian rule that would last until 1974. Greece remained on good terms with Britain and

2910-498: The Slavic invasion in the 7th century resulted in a collapse in imperial authority in the Greek peninsula . The imperial government retained control of only the islands and coastal areas, particularly the populated walled cities such as Athens, Corinth and Thessalonica. However, the view that Greece underwent decline, fragmentation and depopulation is considered outdated, as cities show institutional continuity and prosperity between

3007-895: The United Kingdom , each sent a navy. The allied fleet destroyed the Ottoman–Egyptian fleet at the Battle of Navarino , and the Greeks captured Central Greece by 1828. The nascent Greek state was recognised under the London Protocol in 1830. In 1827, Ioannis Kapodistrias , was chosen by the Third National Assembly at Troezen as the first governor of the First Hellenic Republic . Kapodistrias established state, economic and military institutions. Tensions appeared between him and local interests and, following his assassination in 1831 and

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3104-460: The election . In 2020, Greece's parliament elected a non-partisan candidate, Katerina Sakellaropoulou , as the first female President of Greece . In February 2024, Greece became the first Orthodox Christian country to recognise same-sex marriage and adoption by same-sex couples. Located in Southern and Southeast Europe, Greece consists of a mountainous, peninsular mainland jutting out into

3201-454: The 19th century, many "crypto-Christians" returned to their old religious allegiance. The nature of Ottoman administration of Greece varied, though it was invariably arbitrary and often harsh. Some cities had governors appointed by the Sultan , while others, like Athens, were self-governed municipalities. Mountainous regions in the interior and many islands remained effectively autonomous from

3298-479: The 2nd and 3rd centuries, and Christianity's early leaders and writers were mostly Greek-speaking, though not from Greece itself. The New Testament was written in Greek, and some sections attest to the importance of churches in Greece in early Christianity . Nevertheless, much of Greece clung to paganism, and ancient Greek religious practices were still in vogue in the late 4th century AD, when they were outlawed by

3395-590: The 4th and 6th centuries. In the early 6th century, Greece had approximately 80 cities according to the Synekdemos chronicle, and the 4th to the 7th century is considered one of high prosperity. Until the 8th century almost all of modern Greece was under the jurisdiction of the Holy See of Rome . Byzantine Emperor Leo III moved the border of the Patriarchate of Constantinople westward and northward in

3492-496: The 4th century BC, the Greek poleis were subjugated to the rising power of the kingdom of Macedon under king Philip II into an alliance known as the Hellenic League . After Philip's assassination in 336 BC, his son and king of Macedon , Alexander , set himself leader of a Panhellenic campaign against the Persian Empire and abolished it. Undefeated in battle, he marched, until his untimely death in 323 BC, to

3589-597: The 5th century, is known as the Byzantine Empire , but called "Kingdom of the Romans" in its own time. With its capital in Constantinople , its language and culture were Greek and its religion was predominantly Eastern Orthodox Christian . The Empire's Balkan territories, including Greece, suffered from the dislocation of barbarian invasions ; raids by Goths and Huns in the 4th and 5th centuries and

3686-482: The 8th century. The Byzantine recovery of lost provinces during the Arab–Byzantine wars began in the 8th century and most of the Greek peninsula came under imperial control again. This process was facilitated by a large influx of Greeks from Sicily and Asia Minor to the Greek peninsula, while many Slavs were captured and re-settled in Asia Minor. During the 11th and 12th centuries the return of stability resulted in

3783-727: The Bulgarians 40,000, and the Italians 9,000. Following liberation, Greece annexed the Dodecanese Islands from Italy and regained Western Thrace from Bulgaria. The country descended into a civil war between communist forces and the anti-communist Greek government, which lasted until 1949, with the latter's victory. The conflict, one of the earliest struggles of the Cold War , resulted in further economic devastation, population displacement and political polarisation for

3880-702: The Dark Ages is traditionally dated to 776 BC, the year of the first Olympic Games . The Iliad and the Odyssey , the foundational texts of Western literature , are believed to have been composed by Homer in the 7th or 8th centuries BC. Poetry shaped beliefs to the Olympian gods , but ancient Greek religion had no priestly class or systematic dogmas and encompassed other currents, such as popular cults, like that of Dionysus , mysteries and magic . At this time there emerged kingdoms and city-states across

3977-684: The Earth. They are structurally depressed areas of the world that make up some of the most extensive natural lowlands on the Earth's surface. Greece – in Europe  (light green & dark grey) – in the European Union  (light green) Greece , officially the Hellenic Republic , is a country in Southeast Europe . Located on the southern tip of the Balkan peninsula , Greece shares land borders with Albania to

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4074-620: The Great Powers, however, Greece lost little territory, while Crete was established as an autonomous state under Prince George of Greece . With state coffers empty, fiscal policy came under International Financial Control . The government, aiming to quell Komitadjis and detach the Slavophone peasants of the region from Bulgarian influence, sponsored a guerrilla campaign in Ottoman-ruled Macedonia , known as

4171-679: The Greek peninsula benefiting from economic growth. The Greek Orthodox Church was instrumental in the spread of Greek ideas to the wider Orthodox world . Following the Fourth Crusade and fall of Constantinople to the " Latins " in 1204, mainland Greece was split between the Greek Despotate of Epirus and French rule (the Frankokratia ). The re-establishment of the imperial capital in Constantinople in 1261

4268-537: The Greek peninsula, which spread to the shores of the Black Sea , Magna Graecia in southern Italy , and Asia Minor . These reached great prosperity that resulted in an unprecedented cultural boom, that of classical Greece , expressed in architecture , drama , science , mathematics and philosophy . In 508 BC, Cleisthenes instituted the world's first democratic system of government in Athens . By 500 BC,

4365-682: The Ionian Islands, located to the west of the mainland in the Ionian Sea. The climate of Greece is primarily Mediterranean ( Köppen : Csa ), featuring mild to cool, wet winters and hot, dry summers. This climate occurs at most of the coastal locations, including Athens , the Cyclades , the Dodecanese , Crete , the Peloponnese , the Ionian Islands , and parts of mainland Greece . The Pindus mountain range strongly affects

4462-412: The Ionian islands and Constantinople lived in prosperity, and Greeks of Constantinople ( Phanariots ) achieved power within the Ottoman administration, much of Greece suffered the economic consequences of Ottoman conquest. Heavy taxes were enforced, and in later years the Ottoman Empire enacted a policy of creation of hereditary estates, effectively turning the rural Greek populations into serfs , while

4559-421: The Latin Graecia and Graecus , from the name of the Graeci ( Γραικοί , Graikoí ; singular Γραικός , Graikós ), one of first ancient Greek tribes to settle Magna Graecia in southern Italy . The Apidima Cave in Mani , in southern Greece, has been suggested to contain the oldest remains of early modern humans outside of Africa, dated to 200,000 years ago. However others suggest

4656-448: The Ottoman Empire, established communities throughout the Mediterranean, the Balkans, and Europe, and used their wealth to fund educational activities that brought younger generations into contact with Western ideas. In the 18th century, an increase in learning during the Modern Greek Enlightenment led to the emergence among Westernized Greek-speaking elites of the notion of a Greek nation . A secret organization formed in this milieu

4753-590: The Ottoman conquest had cut Greece off from European historical developments. The Greek Orthodox Church and the Ecumenical Patriarchate of Constantinople were considered by the Ottoman governments as the ruling authorities of the entire Orthodox Christian population of the Ottoman Empire, whether ethnically Greek or not. Although the Ottoman state did not force non-Muslims to convert to Islam , Christians faced discrimination. Discrimination, particularly when combined with harsh treatment by local Ottoman authorities, led to conversions to Islam, if only superficially. In

4850-462: The Ottomans in 1453 and by 1460, Ottoman conquest of mainland Greece was complete. While most of mainland Greece and the Aegean islands was under Ottoman control by the end of the 15th century, Cyprus and Crete remained Venetian and did not fall to the Ottomans until 1571 and 1669 respectively and Venice maintained control of the Ionian Islands until 1797, after which they fell under first French, then British control. While some Greeks in

4947-407: The Ottomans in 1877 , Greek sentiment rallied to Russia, but Greece was too poor and concerned about British intervention, to enter the war. Greeks in Crete continued to stage revolts, and in 1897, the Greek government, bowing to popular pressure, declared war on the Ottomans. In the ensuing Greco-Turkish War of 1897 , the badly trained and equipped Greek army was defeated. Through the intervention of

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5044-465: The Polytechnic uprising. A democratic and republican constitution was promulgated in 1975 following a referendum which chose not to restore the monarchy. Meanwhile, Andreas Papandreou , George Papandreou's son, founded the Panhellenic Socialist Movement (PASOK) in response to Karamanlis's conservative New Democracy party, with the two political formations dominating government over the next four decades. Greece rejoined NATO in 1980. Greece became

5141-427: The Roman emperor Theodosius I in 391–392. The last recorded Olympic games were held in 393, and many temples were destroyed or damaged in the century that followed. The closure of the Neoplatonic Academy of Athens by Emperor Justinian in 529 is considered the end of antiquity, although there is evidence that the academy continued. The Roman Empire in the east, following the fall of the Western Roman Empire in

5238-428: The Turks and Egyptians ravaged the islands, committing massacres . This galvanized opinion in western Europe in favour of the Greeks. The Ottoman Sultan Mahmud II negotiated with Mehmet Ali of Egypt , who agreed to send his son Ibrahim Pasha with an army, in return for territorial gain. By the end of 1825, most of the Peloponnese was under Egyptian control. Three great powers , France , Russian Empire , and

5335-482: The adoption of the euro, Greece could no longer devalue its currency to regain competitiveness. In the 2012 elections, there was major political change, with new parties emerging from the collapse of the two main parties, PASOK and New Democracy. In 2015, Alexis Tsipras was elected as prime minister, the first outside the two main parties. The Greek government-debt crisis , and subsequent austerity policies, resulted in social strife. The crisis ended around 2018, with

5432-404: The agents from hills or mountains. Biomes on plains include grassland ( temperate or subtropical ), steppe ( semi-arid ), savannah ( tropical ) or tundra ( polar ). In a few instances, deserts and rainforests may also be considered plains. Plains in many areas are important for agriculture because where the soils were deposited as sediments they may be deep and fertile , and

5529-488: The banks of the Indus . Alexander's empire fragmented, inaugurating the Hellenistic period . After fierce conflict amongst themselves, the generals that succeeded Alexander and their successors founded large personal kingdoms in the areas he had conquered, such as that of the Ptolemies in Egypt and of the Seleucids in Syria , Mesopotamia and Iran . The newly founded poleis of these kingdoms, such as Alexandria and Antioch , were settled by Greeks as members of

5626-558: The birthplace of Western civilisation. The earliest of them was the Cycladic culture which flourished on the islands of the Aegean Sea , starting around 3200 BC, and produced an abundance of folded-arm and other marble figurines . From c.  3100 BC to 1100 BC, Crete , a major cultural and economic centre, was home to the Minoan civilization known for its colourful art , religious figurines , and monumental palaces . The Minoans wrote their undeciphered language using scripts known as Linear A and Cretan hieroglyphs . On

5723-401: The central Ottoman state for centuries. The 16th and 17th centuries are regarded as a "dark age" in Greek history, with the prospect of overthrowing Ottoman rule appearing remote. However, prior to the Greek Revolution of 1821, there had been wars which saw Greeks fight against the Ottomans, such as the Greek participation in the Battle of Lepanto in 1571, the Morean War of 1684–1699, and

5820-411: The climate of the country, as areas to the west of the range are considerably wetter on average (due to greater exposure to south-westerly systems bringing in moisture) than the areas lying to the east of the range (due to a rain shadow effect), resulting to some coastal areas in the south falling to the hot semi-arid climate ( Köppen : BSh ) category, such as parts of the Athens Riviera and some of

5917-482: The country one of the most mountainous in Europe. Mount Olympus , the mythical abode of the Greek Gods , culminates at Mytikas peak 2,918 metres (9,573 ft), the highest in the country. Western Greece contains a number of lakes and wetlands and is dominated by the Pindus mountain range. The Pindus, a continuation of the Dinaric Alps , reaches a maximum elevation of 2,637 m (8,652 ft) at Mt. Smolikas (the second-highest in Greece) and historically has been

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6014-432: The dowry was abolished, while education and foreign policy doctrines changed. However, Papandreou's tenure has been associated with corruption, high inflation, stagnation and budget deficits that later caused problems. The country adopted the euro in 2001 and successfully hosted the 2004 Summer Olympic Games in Athens. In 2010, Greece suffered from the Great Recession and related European sovereign debt crisis . Due to

6111-446: The eighth century BC, the Greeks were organised into various independent city-states known as poleis (singular polis ) that spanned the Mediterranean and Black seas. Philip II of Macedon united most of present-day Greece in the fourth century BC, with his son Alexander the Great rapidly conquering much of the known ancient world from the eastern Mediterranean to northwestern India. The subsequent Hellenistic period saw

6208-399: The end of the bailout mechanisms and return of growth. Simultaneously, Tsipras, and the leader of North Macedonia, Zoran Zaev , signed the Prespa Agreement , solving the naming dispute that had strained the relations and eased the latter's way to become a member of the EU and NATO. In 2019, Kyriakos Mitsotakis became Greece's new prime minister, after his centre-right New Democracy won

6305-410: The establishment of economic relations with the East, a stratum of wealthy euergetai dominated their internal life. From about 200 BC the Roman Republic became increasingly involved in Greek affairs and engaged in a series of wars with Macedon . Macedon's defeat at the Battle of Pydna in 168 BC signalled the end of Antigonid power. In 146 BC, Macedonia was annexed as a province by Rome, and

6402-399: The few arable places in the country. Greece features a vast number of islands —between 1,200 and 6,000, depending on the definition, 227 of which are inhabited. Crete is the largest and most populous island; Euboea , separated from the mainland by the 60 m-wide Euripus Strait , is the second largest, followed by Lesbos and Rhodes . The Greek islands are traditionally grouped into

6499-595: The flatness facilitates mechanization of crop production; or because they support grasslands which provide good grazing for livestock . The types of depositional plains include: Erosional plains have been leveled by various agents of denudation such as running water, rivers, wind and glacier which wear out the rugged surface and smoothens them. Plain resulting from the action of these agents of denudation are called peneplains (almost plain) while plains formed from wind action are called pediplains . Structural plains are relatively undisturbed horizontal surfaces of

6596-406: The following clusters: the Argo-Saronic Islands in the Saronic gulf near Athens; the Cyclades, a large but dense collection occupying the central part of the Aegean Sea; the North Aegean islands , a loose grouping off the west coast of Turkey; the Dodecanese, another loose collection in the southeast between Crete and Turkey; the Sporades , a small tight group off the coast of northeast Euboea; and

6693-419: The ground in this region. The ice layer would have been between 100 m and 1 km thick. When one substance moves up through another denser substance, it is called a diapir . So, it seems that large masses of ice have pushed up layers of rock into domes that were subsequently eroded. After erosion removed the top of the layered domes, circular features remained. Planitia A plain or flatland

6790-404: The height of Greek culture and influence in antiquity. Greece was annexed by Rome in the second century BC, becoming an integral part of the Roman Empire and its continuation, the Byzantine Empire , which was predominately Greek in culture and language . The Greek Orthodox Church , which emerged in the first century AD, helped shape modern Greek identity and transmitted Greek traditions to

6887-449: The mainland, the Mycenaean civilization developed around 1750 BC and lasted until c.  1100 BC. The Mycenaeans possessed advanced military and built large fortifications . They worshiped many gods and used Linear B to write the earliest attested form of Greek known as Mycenaean Greek . The collapse of the Mycenean civilization ushered in the Greek Dark Ages , from which written records are absent. The end of

6984-521: The military, made Greece a member of the Balkan League , and led it through the Balkan Wars . By 1913, Greece's territory and population had doubled, annexing Crete, Epirus , and Macedonia . The struggle between King Constantine I and charismatic Venizelos over foreign policy on the eve of First World War dominated politics and divided the country into two opposing groups . During parts of

7081-415: The new junta strongman. On 20 July 1974, Turkey invaded the island of Cyprus in response to a Greek-backed Cypriot coup, triggering a crisis in Greece that led to the regime's collapse and restoration of democracy through Metapolitefsi . The former prime minister Konstantinos Karamanlis was invited back from self-exile and the first multiparty elections since 1964 were held on the first anniversary of

7178-572: The next thirty years. Although post-war was characterised by social strife and marginalisation of the left, Greece experienced rapid economic growth and recovery, propelled in part by the U.S. Marshall Plan . In 1952, Greece joined NATO , reinforcing its membership in the Western Bloc of the Cold War. King Constantine II 's dismissal of George Papandreou 's centrist government in 1965 prompted political turbulence, which culminated in

7275-644: The northwest, North Macedonia and Bulgaria to the north, and Turkey to the east. The Aegean Sea lies to the east of the mainland , the Ionian Sea to the west, and the Sea of Crete and the Mediterranean Sea to the south. Greece has the longest coastline on the Mediterranean Basin , featuring thousands of islands . The country comprises nine traditional geographic regions , and has

7372-638: The remains represent archaic humans . All three stages of the Stone Age are represented in Greece, for example in the Franchthi Cave . Neolithic settlements in Greece, dating from the 7th millennium BC, are the oldest in Europe, as Greece lies on the route by which farming spread from the Near East to Europe. Greece is home to the first advanced civilizations in Europe and is often considered

7469-472: The rest of Greece became a Roman protectorate. The process was completed in 27 BC, when emperor Augustus annexed the rest of Greece and constituted it as the senatorial province of Achaea . Despite their military superiority, the Romans admired and became heavily influenced by Greek culture. Greek-speaking communities of the Hellenised East were instrumental in the spread of Christianity in

7566-509: The sea at the southern end of the Balkans , ending at the Peloponnese peninsula (separated from the mainland by the canal of the Isthmus of Corinth ) and strategically located at the crossroads of Europe, Asia, and Africa. Its highly indented coastline and numerous islands give Greece the 11th longest national coastline in the world, with 13,676 km (8,498 mi); its land boundary

7663-588: The shapes of many features in Hellas Planitia and other parts of Mars are strongly suggestive of glaciers , as the surface looks as if movement has taken place. These relatively flat-lying "cells" appear to have concentric layers or bands, similar to a honeycomb. This honeycomb terrain was first discovered in the northwestern part of Hellas. The geologic process responsible for creating these features remains unresolved. Some calculations indicate that this formation may have been caused by ice moving up through

7760-437: The surface. The altitude difference between the rim and the bottom is over 9,000 m (30,000 ft). Despite being deeper than the Moon's South Pole-Aitken basin , Hellas' rim peaks are significantly less prominent. This may be because large Martian impacts such as Hellas induced global hot rainfall and meltwater flows that degraded crater rims, including their own. The crater's depth of 7,152 m (23,465 ft) below

7857-519: The temperature were to rise above 0 Celsius. Hellas Planitia is antipodal to Alba Patera . It and the somewhat smaller Isidis Planitia together are roughly antipodal to the Tharsis Bulge , with its enormous shield volcanoes, while Argyre Planitia is roughly antipodal to Elysium , the other major uplifted region of shield volcanoes on Mars. Whether the shield volcanoes were caused by antipodal impacts like that which produced Hellas, or if it

7954-486: The tenth member of the European Communities in 1981, ushering in sustained growth. Investments in industrial enterprises and heavy infrastructure, as well as funds from the European Union and growing revenue from tourism, shipping, and a fast-growing service sector raised the standard of living . In 1981, the election of Andreas Papandreou resulted in reforms over the 1980s. He recognised civil marriage,

8051-498: The topographic datum of Mars explains the atmospheric pressure at the bottom: 12.4 mbar (1240 Pa or 0.18 psi) during winter, when the air is coldest and reaches its highest density. This is 103% higher than the pressure at the topographical datum (610 Pa, or 6.1 mbar, or 0.09 psi) and above the triple point of water , suggesting that the liquid phase could be present under certain conditions of temperature, pressure, and dissolved salt content. It has been theorized that

8148-651: The war, Greece had two governments: A royalist pro-German one in Athens and a Venizelist pro- Entente one in Thessaloniki . They united in 1917, when Greece entered the war on the side of the Entente. After the war, Greece attempted expansion into Asia Minor , a region with a large native Greek population, but was defeated in the Greco-Turkish War (1919–1922) , contributing to a flight of Asia Minor Greeks . These events overlapped, happening during

8245-417: The war. The following era was marked by instability, as over 1.5 million propertyless Greek refugees from Turkey (some of whom could not speak Greek) had to be integrated into Greek society. The refugees made a dramatic population boost, as they were more than a quarter of Greece's prior population. Following the catastrophic events in Asia Minor, the monarchy was abolished via a referendum in 1924 and

8342-475: The wider Orthodox world . After the Fourth Crusade in 1204, Latin possessions were established in parts of the Greek peninsula, but most of the area fell under Ottoman rule by the mid-15th century. Following a protracted war of independence , which started in 1821, Greece emerged as a modern nation state in 1830. Over the first hundred years, the Kingdom of Greece sought territorial expansion , which

8439-713: The winter of 1941–42, tens of thousands more died because of reprisals by Nazis and collaborators , the economy was ruined, and most Greek Jews (tens of thousands) were deported and murdered in Nazi concentration camps. The Greek Resistance , one of the most effective resistance movements, fought against the Nazis. The German occupiers committed atrocities, mass executions, and wholesale slaughter of civilians and destruction of towns and villages in reprisals. Hundreds of villages were systematically torched and almost 1 million Greeks left homeless. The Germans executed around 21,000 Greeks,

8536-577: The winter. Most of the inland parts of northern Greece, in Central Macedonia , the lower elevations of Western Macedonia and Eastern Macedonia and Thrace feature a humid subtropical climate ( Köppen : Cfa ) with cold, damp winters and hot, moderately dry summers with occasional thunderstorms. Snowfalls occur every year in the mountains and northern areas, and brief periods of snowy weather are possible even in low-lying southern areas, such as Athens . Phytogeographically , Greece belongs to

8633-585: Was restored in 1974–75, leading to the current parliamentary republic . It was a belligerent on the side of the Greek Cypriots in the Turkish invasion of Cyprus in 1974. Having achieved record economic growth from 1950 through the 1970s , Greece is a developed country with an advanced high-income economy . A founding member of the United Nations , Greece was the tenth member to join what

8730-647: Was accompanied by the empire's recovery of much of the Greek peninsula, while the islands remained under Genoese and Venetian control. During the Paleologi dynasty (1261–1453) a new era of Greek patriotism emerged accompanied by a turning back to ancient Greece. In the 14th century much of the Greek peninsula was lost by the Byzantine Empire to the Serbs and then the Ottomans . Constantinople fell to

8827-654: Was introduced, curbing the power of the monarchy to appoint minority governments . Corruption, coupled with increased spending to fund infrastructure like the Corinth Canal , overtaxed the weak economy and forced the declaration of public insolvency in 1893. Greeks were united, however, in their determination to liberate the Hellenic lands under Ottoman rule; the Cretan Revolt (1866–1869) had raised nationalist fervour. When war broke out between Russia and

8924-473: Was mainly realized in the early 20th century during the Balkan Wars and up until the catastrophic defeat of its Asia Minor Campaign in 1922. The short-lived republic that was established in 1924 was beset by the ramifications of civil strife and the challenge of resettling refugees from Turkey . In 1936 a royalist dictatorship inaugurated a long period of authoritarian rule, marked by military occupation , civil war and military dictatorship . Democracy

9021-548: Was moved from Nafplio , where it had been since 1829, to Athens , then a smaller town. The Church of Greece was established as Greece's national church and 25 March, the day of Annunciation , was chosen as the anniversary of the Greek War of Independence to reinforce the link between Greek identity and Orthodoxy . Otto was deposed in 1862 because of the Bavarian-dominated government, heavy taxation, and

9118-658: Was not allied with the Axis . In October 1940, Fascist Italy demanded the surrender of Greece, but it refused , and, in the Greco-Italian War , Greece repelled Italian forces into Albania. French general Charles de Gaulle praised the fierceness of the Greek resistance, but the country fell to urgently dispatched German forces during the Battle of Greece . The Nazis proceeded to administer Athens and Thessaloniki, while other regions were given to Fascist Italy and Bulgaria. Over 100,000 civilians died of starvation during

9215-814: Was the Filiki Eteria , in 1814. They engaged traditional strata of the Greek Orthodox world in their liberal nationalist cause. The first revolt began on 6 March 1821 in the Danubian Principalities , but was put down by the Ottomans. This spurred the Greeks of the Peloponnese and on 17 March the Maniots declared war on the Ottomans. By October 1821 the Greeks had captured Tripolitsa . There were revolts in Crete, Macedonia and Central Greece , which were suppressed. In 1822 and 1824

9312-603: Was the first recorded union of Greek states since the mythical union of the Trojan War . The second Persian invasion of Greece was decisively defeated in 480–479 BC, at Salamis and Plataea , marking the eventual withdrawal of the Persians from all their European territories. The Greek victories in the Greco-Persian Wars are a pivotal moment in history, as the 50 years of peace afterwards are known as

9409-609: Was the ninth most-visited country in the world in 2023. The native name of the country in Modern Greek is Ελλάδα ( Elláda , pronounced [eˈlaða] ). The corresponding form in Ancient Greek and conservative formal Modern Greek ( Katharevousa ) is Ἑλλάς ( Hellas , classical: [hel.lás] , modern: [eˈlas] ). This is the source of the English alternative name Hellas , which

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