Patriarch Metrophanes III of Constantinople was an Eastern Orthodox prelate who served as the Ecumenical Patriarch of Constantinople during two separate periods between 1565 and 1580. Born in 1520 to a Bulgarian merchant in the village of Agia Paraskevi, he was also known by the name Byzantios. His ecclesiastical career included serving as the Metropolitan of Caesarea before his elevation to the patriarchate. He was noted for his intellectual interests and his efforts to stabilize the finances of the church during his leadership.