Vladimir I of Kiev
Vladimir I of Kiev, also known as Vladimir the Great, was a ruler of the Kievan Rus' from 980 to 1015. He is best known for his role in the Christianization of the region, converting to Christianity himself and promoting the faith among his people. This significant change helped to unify the diverse tribes under his rule and established a foundation for the future development of Eastern Orthodox Christianity in Russia and Ukraine.
Vladimir was born around 958 and was the son of Svyatoslav I of Kiev. He expanded the territory of Kievan Rus' through military conquests and strategic alliances. His reign marked a period of cultural and political growth, and he is often credited with laying the groundwork for the emergence of a unified Russian state.