List of cathedrals in Turkey

There are 1388 registered churches in Turkey. The city with the most churches in Turkey is Istanbul, with 158 churches. Istanbul is followed by Nevşehir with 92 churches, Gümüşhane with 78 churches and Mardin with 69 churches.
This is the list of cathedrals in Turkey sorted by denomination.

Eastern Orthodox

St. George's Cathedral, Istanbul

Oriental Orthodox

Surp Asdvadzadzin Patriarchal Church,

Istanbul

Catholic

Cathedrals of the Catholic Church in Turkey:

Cathedral of the Annunciation, İskenderun
Cathedral of the Holy Spirit, Istanbul
St. Mary of Sakızağaç Cathedral, Istanbul
St. John's Cathedral, İzmir
Co-Cathedral of St. Anthony of Padua, Mersin
Holy Trinity Greek Catholic Cathedral, Istanbul
St. Mary's Cathedral, Diyarbakır