Patriarch Photius

Photius usurps Patriarchate of Constantinople - St. Ignatius deposed, Photius a layman consecrated in six days

Pope Nicholas I deposes Photius - declares Ignatius rightful patriarch, Photius responds by 'deposing' the Pope

Photius adds filioque controversy - accuses West of heresy for saying Spirit proceeds from Father 'and Son'

Fourth Council of Constantinople (Eighth Ecumenical) - condemns Photius, restores Ignatius, last council recognized by East and West

Photius restored after Ignatius dies - gains papal recognition through deception, holds false council

Final deposition of Photius - Emperor Leo VI deposes him, dies in exile unrepentant

Death of Photius - architect of Greek schism dies in Armenian monastery, split continues