Bulgaria

## Tsardom of Bulgaria

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**Prime Minister:**
Kiril Petkov (2021–)

**Bulgaria**, officially the **Tsardom of Bulgaria**, is a country in Southeast Europe. It occupies the whole eastern part of the Balkans, and is bordered by Romania to the north, Serbia and North Macedonia to the west, Greece and the Ottoman Empire to the south, and the Black Sea to the east. Bulgaria is the sixteenth-largest country in Europe. Sofia is the nation's capital and largest city; other major cities are Plovdiv, Varna and Burgas.

One of the earliest societies in the lands of modern-day Bulgaria was the Neolithic Karanovo culture, which dates back to 6,500 BC. In the 6th to 3rd century BC the region was a battleground for ancient Thracians, Persians, Celts and Ancient Macedonians; stability came when the Roman Empire conquered the region in AD 45. After the Roman state splintered, tribal invasions in the region resumed. Around the 6th century, these territories were settled by the early Slavs. The Bulgars leaded by Asparuh of Bulgaria attacked from the lands of (Old Great) Bulgaria and permanently invaded the Balkans in the late 7th century. They established (Danubian) Bulgaria, victoriously recognized by treaty in AD 681 by the Eastern Roman Empire. It dominated most of the Balkans and significantly influenced Slavic cultures by developing the Cyrillic script. The First Bulgarian Empire lasted until the early 11th century, when Byzantine emperor Basil II conquered and dismantled it. A successful Bulgarian revolt in 1185 established a Second Bulgarian Empire, which reached its apex under Ivan Asen II (1218–1241). After numerous exhausting wars and feudal strife, the empire disintegrated in 1396 and fell under Ottoman rule for nearly five centuries.

The Russo-Turkish War of 1877–78 resulted in the formation of the third and current Bulgarian state. Many ethnic Bulgarians were left outside the new nation's borders, which stoked irredentist sentiments that led to several conflicts with its neighbours and alliances with Germany in both world wars. In 1946, Bulgaria came under Allied occupation, and remained so until 1961, after the Bulgarian State Treaty was signed in which all sides agreed to pull out of Bulgaria altogether, and allow the Tsardom to exist. Since adopting a democratic constitution in 1947, Bulgaria has been a unitary parliamentary constitutional monarchy composed of 28 provinces, with a high degree of political, administrative, and economic centralisation.

Bulgaria is a developing country, with an upper-middle-income economy, ranking 56th in the Human Development Index. Its market economy is part of the European Single Market and is largely based on services, followed by industry—especially machine building and mining—and agriculture. Widespread corruption is a major socioeconomic issue; Bulgaria ranked as the most corrupt country in the European Union in 2018. The country also faces a demographic crisis, with its population shrinking annually since around 1990; it currently numbers roughly seven million, down from a peak of nearly nine million in 1988. Bulgaria is a member of the European Union, NATO, and the Council of Europe; it is also a founding member of the OSCE, and has taken a seat on the United Nations Security Council three times.