伏尔加保加利亚
Volga Bulgaria (, ) or Volga–Kama Bulghar, was a historic Bulgar state that existed between the 7th and 13th centuries around the confluence of the Volga and Kama River, in what is now European Russia. Volga Bulgaria was a multi-ethnic state with large numbers of Turkic Bulgars, a variety of Finnic and Ugric peoples, and many East Slavs. The very strategic position of Volga Bulgaria allowed it to create a monopoly between the trade of Arabs, Norse and Avars.