Synods of Seleucia-Ctesiphon (410, 424): the Church of the East organizes
410 – 424
Place: seleucia-ctesiphon
33.094, 44.581 · On the map
Recorded in the Synodicon Orientale (Syriac, insider). Full place record: batch 1 'seleucia-ctesiphon'.
Under Shah Yazdegerd I, the Persian bishops adopted the Nicene creed and set up a hierarchy headed by the bishop of Seleucia-Ctesiphon. The lists name bishops for al-Hira and for Mashmahig (Bahrain) in the Gulf, and the synod of 424 declared independence from the western patriarchs. From then on, Christianity among the Arabs of Iraq and the Gulf ran through this Persian church.
People named here
- Isaac of Seleucia-Ctesiphon
- Yazdegerd I
- Dadisho
Links
People and office
Out
al-Hira, Lakhmid capital and Arab Christian center
The synod lists of 410 include a bishop of al-Hira.
appointed_bishop_for
attestedOut
Beth Qatraye: Christianity on the Gulf coast
The 410 lists include Mashmahig (Bahrain) in the Gulf.
appointed_bishop_for
attested
Sources
- Encyclopaedia Iranica, 'Christianity i. In Pre-Islamic Persia: Literary Sources'
Encyclopaedia Iranica Foundation. Accessed 2026-11-11.
- Wikipedia: Synod of Isaac
Wikipedia contributors (CC BY-SA 4.0). Accessed 2026-11-11.
- Wikipedia: Church of the East
Wikipedia contributors (CC BY-SA 4.0). Accessed 2026-11-11.