CONSTANTINE VI. (1861-1930), Patriarch of the Greek Orthodox Church, whose family name was Araboghlou, was born at Sigmi, Anatolia, became metropolitan of Derkos, and succeeded Gregory VII. as Oecumenical Patriarch on Dec. 17, 1924, but was expelled from Constantinople on Jan. 3o, 1925, on the ground that he was not "domiciled" in the sense of the terms of the treaty of Lausanne. He retired to Salonika, and resigned in order to avoid friction. He was succeeded in the patriarchate by Basil Georgiades, metropolitan of Nicaea.
For a full account of the dispute over the expulsion of Constantine see Survey of Internat. Af. 1925, vol. ii., pp. 266 et seq. (1927).