The presented monograph addresses the issue of the place in Russian and church-Horde relations of the Institute of Kyiv Metropolitans, so important in the designated period. Outlining the range of main problems, the author, based on a wide range of sources, concluded that the special relationship with the Horde allowed the institute of Kyiv metropolitans to become a full-fledged and influential participant in Russian-Horde relations and take an exceptional position: between Russia and the Horde. This study is the basis for raising the problem of the degree of inclusion of the Old Russian nobility in the Golden Horde elites, the final resolution of which, sooner or later, will allow us to declare the extent to which the Russian lands became part of the Golden Horde, which it really occupied. The publication is addressed to researchers, graduate students, students and those who are simply interested in the history of the Russian Orthodox Church and the Horde.