It is attested between the 9th and the 13th centuries, but later declined, to be renewed again, thus existing up to the modern times.
Eight Syriac Orthodox bishops of Baghdad from the medieval period are mentioned in the narratives of Michael the Syrian, Bar Hebraeus and other sources.
Eight Jacobite bishops of Baghdad are attested between the ninth and thirteenth centuries.
The bishop Laʿzar bar Sabtha of Baghdad was deposed by the patriarch Dionysius of Tel Mahre (818–45) in 826.
[5] The diocese of Baghdad seems to have lapsed around the end of the thirteenth century, but was later renewed.