Bulgaria corresponds to old Thrace, whose inhabitants are mentioned by Homère; Rome organized these territories in provinces of Messiah and Thrace (I er century apr. J. - C.). Included in the Roman Empire of the East, these provinces became one of the theaters of the great invasions: that of the Slavic ones - assimilatrice -, to the VI E and VII E centuries, leads to their permanent installation. Many and turned into a sedentary population, they imposed their language, of Indo-European origin.

Isolated from European civilization during the long Othoman occupation, this remote stage of the East-Express train, unhappy heroin of the Balkan wars of the beginning of the XX E century, were still an underdeveloped country when the “iron curtain” locked up it in the socialist camp. The abandonment of planning required, like elsewhere in Central Europe, of painful reconversions.