Bishop of the Goths
The Goths of the Crimea were the descendants of a Germanic people long settled on the northern shore of the Black Sea who had embraced Orthodox Christianity. John lived among them in the eighth century, a time when the Byzantine Church was torn by the iconoclast controversy under the emperor Constantine Copronymos (741-775) and his successors.
When the Gothic see was left without a bishop in those years, the people asked John to take up the office. Because the Church within the empire was then dominated by the iconoclasts, he went to Georgia, which had remained free of the heresy, and was consecrated there before returning to lead his flock.