Metropolis of Chalcedon

The Metropolis of Chalcedon (Greek: Μητρόπολη Χαλκηδόνος) is an ecclesiastical territory (diocese) of the Ecumenical Patriarchate of Constantinople. Christianity spread in Chalcedon during the 2nd century AD. The city was initially the see of a bishopric before being promoted to a metropolis at 451 AD, at the time of the Fourth Ecumenical Council. In 2005, it was the senior of the four remaining active Greek Orthodox Church metropolises of the Ecumenical Patriarchate in Turkey and the only one surviving in Asia Minor (Anatolia). As of 2024, it is numbered as the senior of nine active Metropolises that are active in Turkey, after the Archdiocese of Constantinople-New Rome.