The Metropolis of Ephesus (Greek: Μητρόπολις Εφέσου) was an ecclesiastical territory (metropolis) of the Ecumenical Patriarchate of Constantinople in western Asia Minor, modern Turkey. Christianity was introduced already in the city of Ephesus in the 1st century AD by Paul the Apostle. The local Christian community comprised one of the seven churches of Asia mentioned in the Book of Revelation. The metropolis remained active until 1922-1923.