In the Lavra of Saint Athanasius, the most reverent singer and domestikos, the Venerable Gregory, shone with a high life. He became known due to a miraculous event related to his service. The Most Holy Ecumenical Patriarch Callistus I, during the igumenate of the most reverend Jacob the Prikan, determined that the hymn 'Rejoice, O Theotokos' be sung at the Divine Liturgy of Saint Basil the Great. However, his successor, the Most Holy Philotheus, canceled this decree, commanding that 'It is truly meet' be sung instead. This caused confusion in the Church. The night before the Feast, Gregory of Alexandria commanded the domestikos Gregory to sing 'Rejoice, O Theotokos', despite the opposition from the supporters of Philotheus. After the vigil, the weary singer saw in a dream the Mistress of the world, Who thanked him for the hymn and handed him a golden coin, which was hung on the holy icon of the Mother of God in the Lavra. From that time, the Church determined to sing 'Rejoice, O Theotokos' at the Divine Liturgies of Saint Basil the Great and at the vigil services.
