Plovdiv Treaty of San Stefano on 3 March 1878, the Principality of Bulgaria included the lands with predominantly Bulgarian population. Plovdiv which was the biggest and most vibrant Bulgarian city was selected as a capital of the restored country and for a seat of the Temporary Russian Government. Great Britain and Austria-Hungary, however, did not approve that treaty and the final result of the war was concluded in the Congress of Berlin which divided the newly liberated country into several parts. It separated the autonomous region of Eastern Rumelia from Bulgaria, and Plovdiv became its capital. The Ottoman Empire created a
Plovdiv is the second or the third-largest cosmopolitan city inhabited by Bulgarians, after Sofia and possibly Varna. According to the 2001 census, out of a population of 338,224 inhabitants, the Bulgarians numbered 302,858 (90%). Stolipinovo in Plovdiv is the largest Roma neighbourhood in the Balkans, having a population of around 20,000 alone; further Roma ghettos are Hadji Hassan Mahala and Sheker Mahala. Therefore, the census number is a deflation of the number of Roma people, and they are most likely the second-largest group after the Bulgarians, most of all because the Muslim Roma in Plovdiv claim to be of Turkish ethnicity