"Although Christianity in Kiev existed before Vladimir’s time, he had remained a pagan, accumulated about seven wives, established temples, and, it is said, taken part in idolatrous rites involving human sacrifice." Vladimir I (Grand Prince of Kiev), Encyclopædia Britannica
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С. В. Шевченко (ред.). К вопросу о дате основания г. Владимира, ТОО "Местное время", 1992. (S. V. Shevchenko (ed.). On the foundation date of Vladimir. in Russian)