Vladimir I Sviatoslavich or Volodymyr I Sviatoslavych, given the epithet "the Great", was Prince of Novgorod from 970 and Grand Prince of Kiev from 978 until his death in 1015. The Catholic Church and the Eastern Orthodox Church both canonised him as Saint Vladimir. 956 – July 21, 1015; died at about 59. Alive at the same time as Avicenna, Murasaki Shikibu, Leif Erikson, Sylvester II, and Ferdowsi. Wiki link