Dioceses of the Church of the East after 1552
Diocese No . of Churches No . of Priests No . of Believers
Baghdad and Basra 6 13 29,578
Mosul 24 40 44,314
Kirkuk 8 18 7,620
Zakho 16 18 10,852
ʿ Amadiya 16 17 5,457
ʿ Aqra 13 5 2,779
Urmi - - 6,000
Salmas - 4 3,350
After the schism of 1552 of the Church of the East, the secessions the Chaldean Catholic Church and the Assyrian Church of the East each had around twelve dioceses each by the end of the 19th century.