Christianity in Turkey
Constantinople became established in the ecclesiastical hierarchy at the Council of Constantinople in 381. Second only to Rome, the legendary origins of the Patriarchate of Constantinople go back to St. Andrew, Metrophanes and Alexander of Constantinople. Constantinople's primacy over the Patriarchates of Alexandria and Antioch was reaffirmed at the Council of Chalcedon in 481, after which the papacy in Rome supported Constantinople in its dispute with Alexandria over monophysitism. Later, when Rome sought to assert its primacy over Byzantium, the Eastern Orthodox church developed the doctrine of pentarchy as a response.
History of the Ottoman Empire
The Ottoman Empire was founded by Osman I. As sultan Mehmed II conquered Constantinople (today named Istanbul) in 1453, the state grew into a mighty empire. The Empire reached its apex under Suleiman the Magnificent in the 16th century when it stretched from the Persian Gulf in the east to Hungary in the northwest; and from Egypt in the south to the Caucasus in the north. The empire came to an end in the aftermath of its defeat by the Allies in World War I. The empire was abolished by the Government of the Turkish Grand National Assembly in Ankara in November 1922 following the Turkish War of Independence (1919–23).