🇧🇬 Bulgaria

Remains of Homo sapiens dated to around 47,000 years before present were found in the Bacho Kiro cave in what is now Bulgaria. They constitute the earliest known arrival of modern humans in Europe, giving the territory a foundational place in the continent's prehistory.

The Karanovo culture emerged around 6,500 BC in the lands of modern Bulgaria and was one of several Neolithic societies thriving on agriculture. It represents the earliest settled agricultural society documented in the territory.

Some time before the 12th century BC the Thracians appeared on the Balkan Peninsula. Tribal and stateless, they excelled in metallurgy and transmitted the Orphean and Dionysian cults to the Greeks, and are counted one of the three primary ancestral groups of modern Bulgarians.

Persian invasions of present-day Bulgarian territories began in the 6th century BC. The external pressure catalysed political unification among the previously fragmented Thracian tribes.

Following the defeat of the second Persian invasion in 479 BC, most Thracian tribes united under king Teres. The Odrysian kingdom was the first substantial state formation in the lands of modern Bulgaria.

Philip II of Macedon reduced the Odrysian kingdom to vassal status in 341 BC. The kingdom was subsequently attacked by Celts in the 3rd century BC, ending Thracian political independence.

The Roman Empire absorbed the Odrysian kingdom as a province in AD 45, bringing stability after centuries of contest between Thracians, Persians, Celts and Macedonians. Roman governance over the whole Balkan Peninsula was established by the end of the 1st century AD.

Around 381, as Christianity spread through the region, the Gothic bishop Ulfilas produced the Gothic Bible in what is today northern Bulgaria. It was the first book written in a Germanic language, a landmark of European literary history located on Bulgarian soil.

With Rome's fall in 476 the Byzantines took over the Balkans, but their prolonged campaigns against Persia left the territories exposed to barbarian incursions. This opened the way for Slavic settlement of the interior.

Around the 6th century the early Slavs entered and settled the Balkan Peninsula, gradually transforming its interior. The partially Hellenised, Romanised and Gothicised Thracians were assimilated by the newcomers, reshaping the region's ethnic composition.

The Bulgars, a Central Asian Turkic tribe, merged with the local Slavic inhabitants in the late 7th century, founding the First Bulgarian Empire, traditionally dated to 681.

Asparukh led the Bulgar horde, a remnant of Old Great Bulgaria north of the Black Sea, into Byzantine Moesia in 680 and subdued the local Slavic tribes. The Bulgars formed a close-knit ruling minority caste over the Slavic population.

Byzantine forces were defeated near the Danube delta, and a subsequent treaty obliged the Byzantine Empire to recognise the new Bulgar state and pay it tribute. The date is conventionally treated as the founding of the Bulgarian state.

Krum issued Bulgaria's first written legal code and defeated a major Byzantine invasion at the Battle of Pliska, where emperor Nicephorus I was killed. The victory and the law code consolidated the young Bulgarian state during the 8th and 9th centuries.

In 864 Boris I converted Bulgaria to Eastern Orthodox Christianity, which was followed by Byzantine recognition of the Bulgarian church and adoption of the Cyrillic alphabet developed at Preslav. Common language, religion and script strengthened central authority and fused Slavs and Bulgars into a single people.

During Simeon's 34-year rule Bulgaria reached its greatest territorial extent and a cultural golden age. Literature in Old Bulgarian spread through Eastern Europe and the language became a regional lingua franca, ranking Bulgaria among the great medieval powers alongside Byzantium and the Frankish realm.

Bulgaria's patron saint founded the Rila Monastery, and the Preslav and Ohrid literary schools were established in the 10th century. Together they underpinned a golden period in medieval Bulgarian literature.

In 927 the Bulgarian Orthodox Church became the first church outside the four ancient patriarchates of Constantinople, Alexandria, Antioch and Jerusalem to obtain autocephaly. Ecclesiastical independence underpinned Bulgarian national identity for centuries.

After Simeon's death in 927 Peter I quelled revolts by two brothers and concluded a favourable treaty with the Byzantines, sealed by his marriage to emperor Romanos' granddaughter. The agreement brought 40 years of peace and domestic prosperity until war resumed in 965.

Preslav fell to Byzantine forces in 971 after successive Rus' and Byzantine invasions. The loss of the capital shattered central authority, though the empire briefly recovered under Samuil.

Byzantine emperor Basil II crushed Samuil's army at Klyuch in 1014, and Samuil died shortly afterwards. The defeat opened the path to the complete Byzantine conquest of Bulgaria.

By 1018 the Byzantines had conquered the First Bulgarian Empire. Basil II forestalled revolt by retaining local nobility within Byzantine bureaucracy and permitting tax in kind rather than gold, while the Bulgarian Patriarchate was demoted to an archbishopric but kept its autocephaly and dioceses.

After Basil II's death in 1025 Byzantine policy shifted to a fragile civilian administration that neglected provincial defence and imposed crushing taxation. The resulting unrest culminated in the uprising of Peter Delyan in 1040–41, as Bulgarian subjects and military elites rebelled.

Exploiting Byzantine decline after the defeat at Manzikert and the disruption of the Crusades, the Asen dynasty nobles led a major uprising in 1185. They restored the Bulgarian state with a new capital at Tarnovo, undoing Byzantine Hellenisation efforts.

The third Asen monarch expanded Bulgarian rule to Belgrade and Ohrid and acknowledged the spiritual supremacy of the pope, receiving a crown from a papal legate. The arrangement gave the restored empire international recognition.

Under Ivan Asen II Bulgarian borders reached the coast of Albania, Serbia and Epirus while commerce and culture flourished. His reign also marked a shift away from Rome in religious matters.

The end of the Asen line in 1257 was followed by internal strife and repeated Byzantine, Hungarian and Mongol attacks. The Golden Horde established suzerainty over the weakened Bulgarian state.

The swineherd Ivaylo drove out the Mongols and briefly became emperor in 1277. He was overthrown by feudal landlords in 1280, whose factional conflicts caused the Second Bulgarian Empire to fragment into small feudal dominions by the 14th century.

In succeeding centuries Bulgaria struggled with the Byzantine Empire to assert its place in the Balkans, but by the end of the 14th century the country was overrun by the Ottoman Turks, beginning five centuries of Ottoman rule.

The Ottomans, first employed as Byzantine mercenaries in the 1340s, became invaders in their own right. Murad I took Adrianople in 1362; Sofia fell in 1382 and Shumen in 1388, as the fragmented Bulgarian rump states proved easy prey.

Tarnovo fell in 1393 after a three-month siege, completing the Ottoman conquest of core Bulgarian lands. Sozopol was the last Bulgarian settlement to fall, in 1453.

The Battle of Nicopolis brought about the fall of the Vidin Tsardom in 1396, subjecting Bulgaria to nearly five centuries of Ottoman rule. The Bulgarian nobility was eliminated, the peasantry enserfed and much of the educated clergy fled abroad.

As Ottoman power waned, Austria supported an uprising in Tarnovo in 1598, a second in 1686, the Chiprovtsi Uprising in 1688 and Karposh's rebellion in 1689. These revolts kept resistance alive but failed to dislodge Ottoman control.

The Western European Enlightenment prompted a Bulgarian national awakening in the 18th century. It restored national consciousness and gave an ideological basis to the liberation struggle, and the National Revival also revived literature and the arts in the 19th century.

The 1774 Treaty of Küçük Kaynarca gave Russia standing as protector of Christians in Ottoman lands. This established the diplomatic basis for later Russian intervention on Bulgaria's behalf.

The April Uprising of 1876 was suppressed by Ottoman authorities with up to 30,000 Bulgarians killed. The massacres prompted the Great Powers to convene the Constantinople Conference in 1876, whose decisions the Ottomans rejected.

The Treaty of San Stefano in March created a large autonomous Bulgarian principality, but the Congress of Berlin later that year reduced its size and returned some territory to Ottoman control. The war is commemorated as Bulgaria's Liberation.

Signed on 3 March 1878, the treaty was to create an autonomous Bulgarian principality spanning Moesia, Macedonia and Thrace, roughly the territory of the Second Bulgarian Empire. The date is now the public holiday National Liberation Day, though the other Great Powers rejected the treaty at once.

The Treaty of Berlin of 13 July 1878 superseded San Stefano, providing only for Moesia and the Sofia region and leaving large ethnic Bulgarian populations outside the new state. This truncation contributed significantly to Bulgaria's militaristic foreign policy in the first half of the 20th century.

From 1880 the Bulgarian National Bank issued the lev, which endured as the national currency until 2026. It was latterly pegged to the euro at 1.95583 leva per euro.

The bloodless coup on 6 September defied the Treaty of Berlin's earlier division of Bulgarian territory. The new unified state survived a brief war with Serbia later that year and was recognised internationally in 1886.

Modern Bulgarian classical music began with Emanuil Manolov's first Bulgarian opera in 1890. Written composition in the lands dates back to Yoan Kukuzel in the 13th–14th century.

Bulgaria took part in the inaugural modern Olympics of 1896, represented by the Swiss gymnast Charles Champaud. It marked the new state's earliest presence in international sport.

The declaration on 22 September ended Bulgaria's status as an autonomous but nominally Ottoman principality, and Ferdinand assumed the title of Tsar. The move was timed to coincide with Austria-Hungary's annexation of Bosnia and Herzegovina.

Bulgaria was involved in three consecutive conflicts between 1912 and 1918, suffering a disastrous defeat in the Second Balkan War and then fighting alongside the Central Powers. Despite fielding a 1,200,000-strong army and victories at Doiran and Monastir, it capitulated in 1918 with 87,500 soldiers killed and significant territorial losses.

More than 253,000 refugees from territories lost in the wars moved into Bulgaria between 1912 and 1929. Their absorption placed additional strain on an economy already ruined by defeat.

Political unrest after the First World War led to Boris III's royal authoritarian rule from 1918 to 1943. His sudden death in mid-1943 threw the country into turmoil as the war turned against Germany.

Women's suffrage was enabled relatively late, in 1937. Women today have equal political rights, high workforce participation and legally mandated equal pay, and Bulgaria ranked 18th in the 2018 Global Gender Gap Report.

Bulgaria joined the Axis in 1941 yet declined to take part in Operation Barbarossa and refused to deport its Jews to concentration camps. The government of Bogdan Filov later failed to secure peace with the Allies.

When Bulgaria did not comply with Soviet demands to expel German forces, the USSR declared war and invaded on 5 September 1944. A coup four days later replaced the government with the communist-dominated Fatherland Front, which left the Axis and fought alongside the Red Army against Germany to the war's end. Bulgaria suffered little war damage and paid no reparations, but lost all its wartime gains except Southern Dobrudzha, and communist rule was consolidated after the war.

Having fought on the losing side in both World Wars, Bulgaria fell within the Soviet sphere of influence and, following a referendum in 1946, became a one-party people's republic within the Soviet-led Eastern Bloc, abolishing the monarchy. Under Georgi Dimitrov (1946–1949) it developed into a repressive, rapidly industrialising Stalinist state.

During Zhivkov's long rule the Soviet-style planned economy saw some experimental market-oriented reforms, and by the mid-1950s living standards had risen and repression eased. His daughter Lyudmila promoted Bulgarian heritage and culture worldwide to bolster national pride.

Bulgaria joined the United Nations in 1955. It has since served three times as a non-permanent member of the Security Council, most recently in 2002–03.

From 1971 Bulgaria contributed two scientific satellites, more than 200 payloads and 300 experiments in Earth orbit, and produced two cosmonauts. The programme established a national capability in space science.

Bulgaria helped found the Organisation for Security and Co-operation in Europe in 1975. Membership gave the socialist state a place in pan-European security dialogue.

The energy ministry said exports reached around 32,000 to 33,000 megawatt hours a day, generating extra revenue as neighbouring countries faced power shortfalls linked to record-low Danube levels. Bulgaria's Kozloduy nuclear plant continued operating normally despite the drought.

Zlatin Krastev presented his credentials in Kyiv, ending a near four-and-a-half-year gap in ambassadorial representation. The appointment came as Bulgaria and Ukraine discussed closer defence-industry cooperation and Black Sea shipping security.

Two of an expected eight KC-135 Stratotankers arrived in early August, after weeks of political debate and protest and a formal objection from Iran. Foreign Minister Velislava Petrova had assured Tehran that no military operations against Iran would be launched from Bulgarian territory.

Having left the presidency to contest elections on a platform of restoring trust in the state, Radev became prime minister on 8 May 2026. The move completed an unusual transfer of a sitting head of state into the head of government.

Radev took office after his new Progressive Bulgaria party won April's snap election, making him the first person in Bulgarian history to have served as both president and prime minister. His stance on Russia and the EU drew scrutiny from European partners.

The new party, founded weeks earlier by former President Rumen Radev, took around 44 per cent of the vote, ending a five-year political crisis that had produced repeated inconclusive elections. Established parties including GERB were left in opposition.

Bulgaria became part of the euro area on 1 January 2026, ending 146 years of the lev. The two currencies circulated jointly until 31 January 2026, after which the euro became the sole legal tender.

The changeover followed years of delay and a pro-Russian party's protests against the switch. The Bulgarian lev ceased to be legal tender on 1 February, with dual pricing in leva and euros required for a further transition period.

Vice President Iliana Iotova succeeded him on 23 January, becoming Bulgaria's first female president. Radev's resignation, amid a long-running political crisis, cleared the way for him to launch a new party ahead of snap parliamentary elections.

Radev resigned the presidency to contest the 2026 elections, and was succeeded by Iliana Iotova, the first woman to hold the office. On 18 February 2026 Iotova appointed a caretaker government under Andrey Gyurov and set elections for 19 April 2026.

Protests against the 2026 budget and government corruption forced the Zhelyazkov cabinet's resignation in December 2025. President Radev had also opposed euro adoption and sought a referendum, though the Constitutional Court had ruled in 2024 that Bulgaria was treaty-bound to adopt the currency.

Tens of thousands had rallied in Sofia and other cities on 1 December, after the government withdrew its proposed budget on 27 November following an earlier wave of demonstrations against planned tax rises. Zhelyazkov quit on 11 December, deepening the political crisis.

The move came amid impending US sanctions against the Russian-owned Neftohim Burgas plant, one of the largest refineries in the Balkans. Lukoil, previously majority-owned by Russian interests, faced growing pressure across its European operations over the course of 2025.

The Plovdiv Province plant was agreed as European governments moved to expand ammunition production capacity amid the war in Ukraine. Bulgarian defence manufacturing continued to expand into 2026, including new deals covering drone and armoured-vehicle production.

President Rumen Radev gave the first negotiation mandate to GERB-SDS on 15 January 2025, and it formed a minority government with BSP and ITN, supported by APS. Eurozone entry was the cabinet's primary commitment.

Corruption and organised crime had earlier caused the rejection of Bulgaria's Schengen application and the withdrawal of foreign investment. The country officially attained full membership of the zone in January 2025.

After requesting off-cycle convergence assessments in February 2025, the reports of 4 June 2025 found Bulgaria compliant. On 8 July 2025 the European Parliament endorsed entry and the Council adopted the final three legislative acts required.

All elected members of the 51st Parliament were sworn in on 11 November 2024, replacing the 50th. Natalia Kiselova was elected speaker only on 6 December 2024, after eleven rounds of voting, illustrating persistent institutional paralysis.

Denkov resigned on 5 March 2024 to allow Gabriel to take over as prime minister, but the planned rotation failed on 20 March amid disagreements between the two alliances. A caretaker cabinet under Glavchev was inaugurated on 9 April 2024 and elections set for 9 June.

Following the 2022 Russian invasion of Ukraine, Bulgaria assisted Ukraine, and after Gazprom illegally stopped exporting gas to Bulgaria, the country ceased importing Russian oil and gas in 2023. The break ended a longstanding energy dependence on Moscow.

The 2021 census counted 6,519,789 people, and a 2022 government estimate put the population at 6,447,710. Population density of 55–60 per square kilometre is almost half the EU average.

After April 2021 no party could form a government, prompting successive elections culminating in a fifth parliamentary vote in April 2023, when the We Continue the Change bloc won 64 of 240 seats. In June 2023 Nikolai Denkov formed a coalition between We Continue the Change and GERB.

Borisov's last cabinet oversaw a dramatic decline in press freedom and a series of corruption revelations, provoking mass protests in 2020. GERB came first in the April 2021 election with its weakest result yet, and repeated deadlock followed.

Bulgaria held the rotating EU Council presidency in 2018, based at the National Palace of Culture in Sofia. It marked the country's first full assumption of that institutional role.

Bulgaria's first geostationary communications satellite was placed in orbit in 2017. It extended the country's long-standing space activity into commercial telecommunications.

The October 2014 elections produced a third GERB win and Borisov formed a coalition with several right-wing parties. He resigned again after his party's candidate lost the 2016 presidential election, and won a further snap election in March 2017 with 95 seats.

Borisov's first cabinet resigned in February 2013 amid mass protests over low living standards, corruption and perceived democratic failure. The successor Oresharski government also resigned, in July 2014, amid continuing large-scale protests.

Repercussions of the 2008 financial crisis produced a 3.6% GDP contraction in 2009 and higher unemployment. Growth resumed in 2010 but intercompany debt exceeded $59 billion, reaching $97 billion or 227% of GDP by 2012.

GERB won the 2009 general election and Borisov formed a minority government, beginning three terms as prime minister between 2009 and 2021. Freedom House has reported continuing deterioration of democratic governance after 2009, citing reduced media independence and abuse of authority.

Bulgaria became a full member of the European Union and its single market on 1 January 2007, entering alongside Romania after extensive judicial and anti-corruption reforms and despite Brussels' continuing concerns over government corruption. The EU maintained a special monitoring mechanism over Bulgaria's justice system and fight against corruption for more than a decade afterwards, and on accession the country committed to eventually adopting the euro in place of the lev.

Bulgaria signed its European Union accession treaty on 25 April 2005. Euro-Atlantic integration had been the principal foreign policy priority since the fall of communism.

Bulgaria became a NATO member in March 2004, as part of the alliance's biggest post-Cold War enlargement alongside six other central and eastern European states, formalising its post-communist reorientation towards Western security structures. It took part in the War in Afghanistan, and military relations with Washington deepened further with the US-Bulgarian Defence Cooperation Agreement signed in April 2006.

After 2001 economic, political and geopolitical conditions improved markedly, and in 2003 Bulgaria reached high Human Development status. Living standards had previously remained below communist-era levels well into the early 2000s.

A balanced budget was achieved in 2003 and the country ran a surplus from the following year. Strong performance in the early 2000s cut government debt from 79.6% of GDP in 1998 to 14.1% in 2008.

The share of Bulgarians who are irreligious or unaffiliated rose from 3.9% in 2001 to 9.3% in 2011 and 15.9% in 2021. The 2021 census recorded 71.5% Christian and 10.8% Muslim.

Bulgarian students were among the world's best readers in 2001, outperforming Canadian and German peers, but by 2006 scores in reading, mathematics and science had fallen. By 2018 PISA studies found 47% of ninth-graders functionally illiterate in reading and natural sciences.

In 2001 Bulgaria hosted six KC-135 Stratotanker aircraft and 200 support personnel for the Afghanistan war effort. It was the first deployment of foreign forces on Bulgarian territory since the Second World War.

The 1998 strategy set out a comprehensive programme to preserve local ecosystems, protect endangered species and conserve genetic resources. Water quality also began improving in 1998 and has maintained moderate improvement since.

The post-communist restructuring culminated in economic collapse in 1997, the year total fertility also hit an all-time low of 1.1. Recovery came only with rapid growth several years later.

Annual inflation had reached triple digits after a banking collapse in 1996, wiping out savings and triggering street protests that brought down the government. The currency board fixed the lev's exchange rate and remained in place through the transition to the euro.

The constitution adopted in July 1991 established a parliamentary republic, creating a relatively weak but directly elected president alongside a prime minister accountable to parliament in place of the communist-era system. Bulgaria was organised as 28 provinces with high political, administrative and economic centralisation, the reform following the Bulgarian Communist Party's surrender of its constitutional monopoly on power the previous year.

Communist domination formally ended in 1990, when Bulgaria held its first free multiparty election in over four decades; the rebranded former Communist Party, the Bulgarian Socialist Party, won in June, showing the continuity of the old elite within the new democratic framework. The country then began the contentious process of moving toward political democracy and a market economy while combating inflation, unemployment, corruption and crime.

The choir won a Grammy in 1990 for its performances of Bulgarian folk music. The award brought international recognition to the country's distinctive folk tradition.

Forest area grew from 3.33 million hectares in 1990 to 3.89 million hectares by 2020, about 36% of the land area. In 2020 naturally regenerating forest covered 3,116,000 hectares and planted forest 777,000 hectares.

Bulgaria achieved its Kyoto Protocol objective by reducing carbon dioxide emissions 30% between 1990 and 2009. It also holds some of the largest Natura 2000 areas in Europe, covering 33.8% of its territory.

The collapse of COMECON markets in 1990 and the subsequent "shock therapy" applied to the planned system caused a steep fall in output. The dislocation culminated in the economic collapse of 1997.

Bulgaria was the world's second-largest wine exporter until 1989 but subsequently lost that standing. The 2016 harvest yielded 128 million litres, of which 62 million were exported chiefly to Romania, Poland and Russia.

Since 1989 Bulgaria has had negative population growth, as post-Cold War economic collapse triggered a long-lasting emigration wave. Between 937,000 and 1,200,000 people, mostly young adults, had left by 2005.

Zhivkov's removal on 10 November followed weeks of demonstrations and came a day after the fall of the Berlin Wall. The party abandoned its constitutional monopoly the following February, opening the way to Bulgaria's first free elections since 1931.

Between 1987 and 1999 the administrative structure consisted of nine provinces. Since the 1880s the number of territorial management units has varied between seven and 26, with today's provinces subdivided into 265 municipalities.

Facing declining birth rates among the ethnic Bulgarian majority, the government in 1984 compelled the Turkish minority to take Slavic names in an attempt to erase their identity. The assimilation campaign drove some 300,000 ethnic Turks to emigrate to Turkey.

The Bulgarian-born writer Elias Canetti received the Nobel Prize in Literature in 1981. Bulgarian letters had earlier been dominated by Ivan Vazov (1850–1921), who bridged pre-Liberation writing and the literature of the new state.

A concerted state effort to teach computing and IT skills in schools produced a large pool of programmers. One side effect was that Bulgaria became a major source of computer viruses in the 1980s and 1990s.

From a largely agricultural, predominantly rural country in 1948, Bulgaria had become an industrial economy by the 1980s, with scientific and technological research a top budget priority. National GDP rose five-fold and per capita GDP quadrupled compared with wartime levels, although severe debt spikes occurred in 1960, 1977 and 1980.