It was first established in 1531 as the
Chaldean Diocese of Amid(a). In June 1915 it gained territory from the suppressed
Chaldean Catholic Diocese of Seert (now a titular see). After the
Assyrian genocide it was left vacant and lapsed after the death of its archbishop in 1923. Nevertheless, the size of the diocese increased on 3 July 1957 from the suppression of the
Chaldean Catholic Diocese of Gazireh. On 3 January 1966, it was promoted to an
Archeparchy (Eastern Catholic archdiocese) and a new archbishop was ordained to fill the role. Since that point, it has been the sole Chaldean diocese in Turkey, and in effect resides over all of Turkeys
Chaldo-Assyrians. Its episcopal see was historically located at
St. Mary's Cathedral in
Diyarbekir, and it still is in modern day. Today, the archeparch (or
archbishop) resides in
Beyoğlu,
Istanbul. Members of the Chaldean Catholic community use the
Holy Trinity Greek Catholic Cathedral as their church; it was formerly used by members of the
Greek Catholic Apostolic Exarchate of Istanbul. ==Demographics==