The monograph covers the main historical frontiers of the history of the so-called "Volga Bulgaria" (Silver Bulgaria) from the moment the state arose to the last major victory over the Mongol-Tatars. The book touches upon issues related to the definition of the territory of the state, the localization of its cities, national composition and political structure. The book is intended for professional historians, archaeologists, local historians, students and all those who are interested in the history of the East European part of Russia of the 9th-13th centuries.