The monograph includes previously unpublished material from the beginning of the 19th century. - the manuscript of the titular adviser K. Milkovich, affecting the historical and economic aspects of the Kazan Territory and the topography of Kazan during its conquest by Ivan IV in 1552. The author of the monograph analyzed the historical and cultural aspects of the development of the Kazan Territory in the late Middle Ages. Historiographic problems associated with the history of the Kazan Territory and the province, in their dynamics and continuity-evolutionary relation (XVI-XIX centuries) are considered. At the end of the work, a glossary and applications are posted.