,Pskov was first mentioned in the chronicle in the year 903, in the connection with the marriage Kievan Prince Igor Rurikovich on the Olga from Pskov. At that time, Igor of Kiev married a local noblewoman who was later canonized as St. Olga (Helena). St. Olga was the first noble of ancient Rus to accept Orthodox Christianity. Her grandson and pupil Vladimir of Kiev directed the conversion of all Kievan Rus to Holy Orthodoxy in 988. The first prince of Pskov was St. Vladimir's younger son Sudislav. Under Olga’s leadership, the first state frontiers of Russia were established.