Patriarch of the Church of the East
b. 6th century · d. 659
37th Catholicos of the East (Seleucia-Ctesiphon) · c. 649–c. 659
Ishoʿyahb III of Adiabene was Patriarch of the Church of the East from 649 to 659. He is known for writing more than one hundred letters that have survived preserving information about Christian life under the earliest period of Islamic rule, including several letters he sent to the Christians of Beth Qatraye in the eastern Arabian Peninsula.
Monastery of Beth Abe · Mesopotamia · Adiabene