Vladimir I Sviatoslavich or Volodymyr I Sviatoslavych (, Volodiměrъ Svętoslavičь; c. 95815 July 1015), nicknamed the Great, was Prince of Novgorod, Grand Prince of Kiev, and ruler of Kievan Rus' from 980 to 1015. Vladimir's father was Prince Sviatoslav I of Kiev of the Rurikid dynasty. After the death of his father in 972, Vladimir, who was then prince of Novgorod, was forced to flee to Scandinavia in 976 after his brother Yaropolk murdered his other brother Oleg of Drelinia, becoming the sole ruler of Rus'. In Sweden, with the help of his relative Ladejarl Håkon Sigurdsson, ruler of Norway, he assembled a Varangian army and reconquered Novgorod from Yaropolk. By 980, Vladimir had consolidated the Rus realm from modern-day Belarus, Russia and Ukraine to the Baltic Sea and had solidified the frontiers against incursions of Bulgarians, Baltic tribes and Eastern nomads. Originally a follower of Slavic paganism, Vladimir converted to Christianity in 988 and Christianized the Kievan Rus'. Due to this act, which fundamentally altered the historical trajectory of the Rus' and led to his declaration as a saint in both Western Christianity and the Eastern Orthodox Church, Vladimir is thus also known as Saint Vladimir or Saint Volodymyr. Rise to power Born in 958, Vladimir was the natural son and youngest son of Sviatoslav I of Kiev by his housekeeper Malusha. Malusha is described in the Norse sagas as a prophetess who lived to the age of 100 and was brought from her cave to the palace to predict the future. Malusha's brother Dobrynya was Vladimir's tutor and most trusted advisor. Hagiographic tradition of dubious authenticity also connects his childhood with the name of his grandmother, Olga of Kiev, who was Christian and governed the capital during Sviatoslav's frequent military campaigns. Transferring his capital to Pereyaslavets in 969, Sviatoslav designated Vladimir ruler of Novgorod the Great but gave Kiev to his legitimate son Yaropolk. After Sviatoslav's death at the hands of the Pechenegs in 972, a fratricidal war erupted in 976 between Yaropolk and his younger brother Oleg, ruler of the Drevlians. In 977, Vladimir fled to his kinsman Haakon Sigurdsson, ruler of Norway, collecting as many Norse warriors as he could to assist him to recover Novgorod. On his return the next year, he marched against Yaropolk. On his way to Kiev he sent ambassadors to Rogvolod (Norse: Ragnvald), prince of Polotsk, to sue for the hand