Olga of Kiev was canonized in the 11th century, during the reign of her grandson, Yaroslav the Wise. Olga was the first ruler of Kievan Rus to be canonized, and her feast day is celebrated on July 24. She is remembered as a wise and just ruler who helped to establish Christianity in Russia.
The Mysterious Reign of Olga of Kiev: Unveiling the Legacy of a Fearless Princess