stylistic:style_transfer, information:classification
History

The former territories of Volga Bulgaria (Kazan Ulus or Kazan Duchy) may have regained a degree of independence within the disintegrating Golden Horde by the turn of the 15th century. The principality was self-governed and maintained a dynasty of Bolgar rulers. Whatever the status of this proto-state, the founder of the khanate was Ulugh Muhammad, who assumed the title of khan and usurped the throne of Kazan with some help from local nobility in 1437 or 1438. It has been suggested that the transfer of power from the local Bolgar dynasty to Muhammad was finalized by his son Maxmud in 1445.

Throughout its history, the khanate was prone to civil turmoil and struggles for the throne. The khans were replaced 19 times in 115 years. There were a total of fifteen reigning khans, some ascending the throne multiple times. The Khan was often elected from the Gengizides by vernacular nobility and even by the citizens themselves.

Regarding the history of the khanate, there is a scarcity of sources. Not only no single document of the khanate survived the Russian conquest, but even the documents of early Russian colonial administration (Prikaz Kazanskogo Dvortsa) were all destroyed during the Time of Troubles.