The Bulgarian state is a sovereign nation located in Southeast Europe, on the Balkan Peninsula. It has a rich history that dates back to the establishment of the First Bulgarian Empire in the 7th century. The country is known for its diverse landscapes, including mountains, plains, and a coastline along the Black Sea. Today, Bulgaria is a parliamentary republic with a capital city of Sofia. It is a member of the European Union and NATO, and its economy is diverse, with key sectors including agriculture, industry, and tourism. The official language is Bulgarian, and the country has a vibrant cultural heritage.