The baptism of the Russian state at the end of the 10th century is one of the fateful periods of all Russian history. With baptism, Russia overcame tribal "pagan" disunity - a new Christian people was formed, who found their place in world civilization. The book examines a variety of subjects related to the history of primary Christianity in Russia: from the pious legend about the path of Andrew the First-Called from the Varangians to the Greeks and descriptions of pagan cults to the construction of architectural masterpieces that complete the process of Christianization - Sofia churches in Kyiv, Novgorod and Polotsk