Казанская губерния
After the capture of Kazan and the territorial-state reform of Peter I in 1708, the conquered Kazan Khanate became the so-called formally independent Kazan tsardom in union with the Russian State. In 1708 the Kazan tsardom was transformed into the Kazan Governorate. In 1717, the Astrakhan Governorate was separated from it.