Tarabrin Sergei Yu. RussiaSaratovSaratov State University, 83 Astrakhanskaya St., Saratov 410012, Russiaаспирантtarabrin.serzh@yandex.ru Author's articles Митрополит Пётр и Переяславский Собор Church and Political Activities of Rostov Bishop Kirill after the Mongol Invasion