08. The Fourth Council of Constantinople, 869-70 A.D.

The Fourth Council of Constantinople was the eighth ecumenical council of the Catholic Church held in Constantinople from 5 October 869, to28 February 870. The council was called by Emperor Basil I the Macedonian, with the support of Pope Hadrian II. It deposed and anathemized Photius, a layman who had been appointed as Patriarch of Constantinople, and reinstated his predecessor Ignatius.

The Council also reaffirmed the decisions of the Second Council of Nicaea in support of icons and holy images.