From the Prologue of Ochrid
In the time of the iconoclast heresy, Emperor Leo the Armenian subjected this John to torments together with his teacher Gregory and with Saint Joseph the Hymnographer. When Gregory ended his earthly life, John became Abbot of the Monastery of the Decapolite in Constantinople. Having become Abbot, he redoubled his ascetic labors for the sake of the Kingdom of God. He reposed peacefully around the year 820. After his death Saint Joseph honorably buried him near the tomb of Saint Gregory.
