Fine 18c Russian Icon - the New Testament Trinity blessing St. John the Chrysostom

18th-century Russian icon in silver revetment cover depicting rare iconography of the New Testament Trinity of Jesus Christ, God the Father, and the Holy Spirit above blessing St. John the Chrysostom. Hallmarked with a Moscow town mark, CA. 1776 assayer's mark, and maker's initials. Ca. 1849 inscription on the back explains the icon's provenance. 

Saint John Chrysostom (c. 349 – 407),  the Archbishop of Constantinople, was an important Early Church Father and one of the most prolific authors in the early Christian Church. He is renowned for his preaching and public speaking, his denunciation of abuse of authority by both ecclesiastical and political leaders, the Divine Liturgy of St. John Chrysostom, and his ascetic sensibilities. The epithet Χρυσόστομος (Chrysostomos, anglicized as Chrysostom) means "golden-mouthed" in Greek and denotes his celebrated eloquence.