Казанское ханство
The capital was initially Sarai Batu and later Sarai Berke. This extensive empire weakened under rivalry of the descendants of Batu and split into Khanate of Kazan, Astrakhan Khanate, Crimean Khanate, Siberia Khanate, Great Horde, Nogai Horde and White Horde during the 15th century. A unified Rus conquered Khanate of Kazan in 1552, Astrakhan Khanate in 1556, Siberia Khanate in 1582, and the Russian Empire conquered Crimean Khanate in 1783.