25 February / 10 March
His predecessor, Patriarch Paul, secretly left the patriarchal throne, retired to a monastery and received the Great Habit. This was during the reign of Irene and Constantine. By Paul's advice, Tarasius, a senator and advisor to the Emperor, was chosen as Patriarch in 784. He quickly passed through all the stages of ordination and became Patriarch. A man of great physical stature and great zeal for Orthodoxy, Tarasius accepted this undesired state in order to help in the struggle of Orthodoxy against heresy, especially that of Iconoclasm. He was responsible for the summoning of the 7th Ecumenical Council in Nicaea in 787, where the iconoclasts were condemned and the veneration of the holy icons was restored and confirmed. Tarasius was very compassionate to the poor and indigent, building them shelters and feeding them, but he was decisive with those in power in the defence of faith and morals. When the Emperor Constantine divorced his lawful wife, Maria, and took a kinswoman to live with him, seeking the Patriarch's blessing to remarry, Tarasius not only withheld his blessing, but first counselled and then reproached him, and finally excommunicated him, As death approached, those round him saw him answering the demons: 'I am not guilty of that sin, nor of that one', until he was incapable of speech. He then began defending himself with his arms, driving them away from him. As he breathed his last, his face shone as with the light of the sun. This truly great hierarch entered into rest in 806. He had governed the Church for 22 years and four months.