The eighth volume of Colloquia Russica, Series I includes materials VIІІ the International scientific conference entitled Religions and Beliefs of Russia (IX-XVI centuries), which took place on November 15-18, 2017 in Lviv. The main organizers of the scientific event were the Ukrainian Catholic University, Lviv National University named after Franco and the Institute of History of the Jagiellonian University in Krakow in cooperation with the Lviv Museum of the History of Religion and the Center for Medieval Studies of the Carpathian National University named after V. Stefanik in Ivano-Frankivsk.