For more than one hundred years the Church of Christ was troubled by the persecution of the Iconoclasts of evil belief, beginning in the reign of Leo the Isaurian (717-741) and ending in the reign of Theophilus (829-842). After Theophilus's death, his widow the Empress Theodora (celebrated Feb. 11), together with the Patriarch Methodius (June 14), established Orthodoxy anew. This ever-memorable Queen venerated the icon of the Mother of God in the presence of the Patriarch Methodius and the other confessors and righteous men, and openly cried out these holy words: "If anyone does not offer relative worship to the holy icons, not adoring them as though they were gods, but venerating them out of love as images of the archetype, let him be anathema." Then with common prayer and fasting during the whole first week of the Forty-day Fast, she asked God's forgiveness for her husband. After this, on the first Sunday of the Fast, she and her son, Michael the Emperor, made a procession with all the clergy and people and restored the holy icons, and again adorned the Church of Christ with them. This is the holy deed that all we the Orthodox commemorate today, and we call this radiant and venerable day the Sunday of Orthodoxy, that is, the triumph of true doctrine over heresy.

Theophylact was from the East; his native city is unknown. In Constantinople he became a close friend of Tarsius, who afterwards became Patriarch of Constantinople (see Feb. 25).Theophylact was made Bishop of Nicomedia. After the death of Saint Tarsius, his successor Nicephorus (see June 2) called together a number of Bishops to help him in fighting the iconoclasm of Emperor Leo the Armenian, who reigned from 813-820. Among them was Euthymius, Bishop of Sardis (celebrated Dec. 26), who had attended the holy Seventh Ecumenical Council in 787 - he was exiled three times for the sake of the holy icons, and for defying the Emperor Theophilus' command to renounce the veneration of the icons, was scourged from head to foot until his whole body was one great wound, from which he died eight days later, about the year 830; Joseph of Thessalonica (see July 14); Michael of Synnada (see May 23); Emilian, Bishop of Cyzicus (see Aug. 8); and Saint Theophylact, who boldly rebuked Leo to his face, telling him that because he despised the long-suffering of God, utter destruction was about to overtake him, and there would be none to deliver him. For this, Theophylact was exiled to the fortress of Strobilus in Karia of Asia Minor, where, after 30 years of imprisonment and hardship, he gave up his holy soul about the year 845. Leo the Armenian, according to the Saint's prophecy, was slain in church on the eve of our Lord's Nativity, in 820.