Key Facts:

Date 410
Location Seleucia-Ctesiphon
Summoned by
Yazdgard I
Chaired by Mar ‘Ishaq [Isaac] , bishop of Seleucia-Ctesiphon
Number of Participants
Key Participants
Bishop Mar ‘Ishaq, Bishop Mar Marutha (representative of the West)
Purpose To unify and organize the Persian church after a period of persecution
Key Events
The council accepts the letter from the Western Church that instructs them to 1) permit only one bishop in a geographical area, 2) celebrate liturgical feasts together on the same day, and 3) adopt the decisions of the Council of Nicaea (325) ; bishop of Seleucia-Ctesiphon made patriarch/catholicos of the East (i.e, the Persian church).

Surviving Documents:

Description and Canons as found in Synodicon Orientale for 410. Syriac Text: Chabot, Synodicon Orientale, pp. 17-36. French: Chabot,Synodicon Orientale, pp. 253-75. English: M.J. Birnie, The Synod of Mar ‘Ishaq.


M.J. Birnie, The Synod of Mar ‘Ishaq AD 410 (unpublished).

Wilhelm Baum and Dietmar W. Winkler, The Church of the East: A Concise History, (London: Routledge, 2003), pp. 14-17.

Ehsan Yar Shater, The Cambridge History of Iran, (Cambridge: Cambridge University Press, 2006), pp. 939-40.



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