Venerable Sergius of Radonezh, was a spiritual leader and monastic reformer of medieval Russia. He is a founder of Sergiev-Troitsky Monastery and together with Venerable Seraphim of Sarov, he is one of the Russian Orthodox Church's most highly venerated saints.
Icon is depicting a Miraculous Vision of St. Sergius: One night, the Abbot Sergius was reading the rule in front of the icon of the Most Holy Theotokos. Having finished reading the canon of the Mother of God, he sat down to rest, but suddenly told his disciple, the Monk Micah, that a miraculous visit awaited them. In a moment the whole monk's cell was sanctified with a miraculous light, and the Mother of God Herself appeared, accompanied by the holy Apostles Peter and John the Theologian. Saint Sergius collapsed from the experiense of the Heavely light, but the Most Holy Theotokos touched him with her hands and, blessing, promised to always patronize his holy monastery.