At the height of its power, in the 10th century AD, the dioceses of the Church of the East numbered well over a hundred and stretched from Egypt to China. These dioceses were organised into six interi
Syrian, Armenian and Latin bishops debate Christian doctrine in the Crusader city of Acre, late 13th century
The citadel of Erbil, chief town in the East Syriac metropolitan province of Adiabene
The mission field of the Church of the East, c. 800
![The headpiece of the Nestorian Stele, erected in 781: 'The tablet of the spread of the brilliant teaching of Ta-ch'in [Syria] in China'](https://upload.wikimedia.org/wikipedia/commons/thumb/b/bf/Nestorians-1-.jpg/500px-Nestorians-1-.jpg)
The headpiece of the Nestorian Stele, erected in 781: 'The tablet of the spread of the brilliant teaching of Ta-ch'in [Syria] in China'
The Metropolitanate of Nisibis was an East Syriac metropolitan province of the Church of the East, between the fifth and seventeenth centuries. The ecclesiastical province of Nisibis had a number of s
Dioceses of the Church of the East to 1318
…Seleucia-Ctesiphon and then grouped most of the Mesopotamian dioceses into five geographically based provinces (by order of precedence, Beth Huzaye, Nisibis, Maishan, Adiabene and Beth Garmaï), each headed by a metropolitan bishop with jurisdiction over several suffragan bishops. Canon XXI of the synod…
The ruins of the East Syriac church of Mar Yaqob in Nisibis
Arch of Ctesiphon