The Church Of The East
At the beginning of the Christian Era, the Roman empire and the Persian empire were traditional enemies. Major Christian centers like Rome and Constantinopole, Alexandria and Antioch were in the Roman Empire. The church in the Persian Empire was known as The Church of The East, loosely referred as the Persian Church. The liturgical language of The Church of The East was East Syric, as distinct from West Syric used by the Syrian Orthodox Church of Antioch. Both these variants are derived from Aramaic, the language of the time of the Christ. After establishing a missionary base in Edessa, St Thomas, with the help of disciples like St Addai, St Haggai and St Mari, evangelised Persia, Mesopotamia, media, Assyria, Parthia, Kurdistan, Babylonia, and other parts of West and central Asiia.By the end of the second century, these churches were on a firm footing ( given the non-interference of the Parthian emperors).