St. Ignatius of Constantinople

St. Ignatius of Constantinople- Catholic Encyclopedia article tells the story of this son of Emperor Michael I, forced into monastic life by a rival. Patriarch of Constantinople, deposed on a wicked pretext. The pope refused to recognize the usurper Photius. Photius thereupon excommunicated the pope, but when Basil the Macedonian became emperor, Ignatius was restored to his see. He died in 877.