25 May 1946 (from League of Nations mandate under British administration)
3 March 1878 (as an autonomous principality within the Ottoman Empire); 22 September 1908 (complete independence from the Ottoman Empire)
Religions
Sunni Muslim 92%, Christian 6% (majority Greek Orthodox, but some Greek and Roman Catholics, Syrian Orthodox, Coptic Orthodox, Armenian Orthodox, and Protestant denominations), other 2% (several small Shia Muslim and Druze populations) (2001 est.)
Bulgarian Orthodox 82.6%, Muslim 12.2%, other Christian 1.2%, other 4% (2001 census)
Languages
Arabic (official), English widely understood among upper and middle classes
Bulgarian 84.5%, Turkish 9.6%, Roma 4.1%, other and unspecified 1.8% (2001 census)