St. Olga, also called Helga or Saint Olga of Kiev, (born c. 890—died 969, Kiev; feast day July 11), princess who was the first recorded female ruler in Russia and the first member of the ruling family of Kiev to adopt Christianity. She was canonized as the first Russian saint of the Orthodox Church and is the patron saint of widows and converts. Olga was the widow of Igor I, prince of...