The religious demography of Mesopotamia was very diverse during late antiquity. From the 1st and 2nd centuries
Syriac Christianity became the primary religion, while other groups practiced
Mandaeism,
Judaism,
Manichaeism,
Zoroastrianism, and the ancient
Assyro-Babylonian Mesopotamian religion. Assyrian Christians of the
Syriac Orthodox Church and
Assyrian Church of the East were probably the most numerous group in the province.
Christianity Asorestan, and particularly Assyria proper, were the centers for the
Church of the East (now split into the
Assyrian Church of the East, the
Ancient Church of the East and the
Chaldean Catholic Church), which at one time extended far beyond the confines of the by then defunct Sasanian empire and was the most widespread
Christian church in the world, reaching well into
Central Asia,
China,
Mongolia Tibet and
India as well as the
Aegean. It sees as its founders the apostle Thomas (
Mar Toma), and Saint Thaddeus (
Mar Addai), and used the distinctly
Syriac version of Eastern Aramaic for its scriptures and liturgy. The
Holy Qurbana of Addai and Mari is one of the oldest
Eucharistic prayers in Christianity, composed around the year 200 AD. The Church of the East was consolidated in 410 at the
Council of Seleucia-Ctesiphon, held at the Sasanian capital,
Selucia-Ctesiphon, which remained the seat of the
Patriarchate of the Church of the East for over 600 years.
Mandaeism The
Mandaeans, who are according to their traditions the original followers of
John the Baptist, are the last surviving
Gnostics from antiquity. According to most scholars,
Mandaeism originated sometime in the first three centuries CE, in either southwestern Mesopotamia or Syria (the southeastern Levant especially). However, some scholars take the view that Mandaeism is older and dates from pre-Christian times. Mandaeans assert that their religion predates Judaism, Christianity, and Islam as a monotheistic faith. Their language and script is
Mandaic, a form of Aramaic. Two of their important religious texts, written between the 1st and 3rd centuries, are the
Ginza Rabba and the
Mandaean Book of John (preserving original traditions about
John the Baptist). The Mandaean population numbers between 60,000 and 100,000 today. Mandaeism flourished in the
Parthian and early
Sassanid period in the region.
Manichaeism The religion of
Manichaeism, founded by
Mani (216–276), originated in 3rd century Asorestan, and spread across a vast geographical area. In some instances, Manichaeism even surpassed the Assyrian Church of the East in its reach, as it was for a time also widespread in the
Roman Empire. While none of the six original
Syriac scriptures of the Manichaeans have survived in their entirety, a long Syriac section of one of their works detailing key beliefs was preserved by
Theodore Bar Konai (a Church of the East author from
Beth Garmaï), in his book
Ketba Deskolion written in about 792. Like the Church of the East, the traditional center of the Manichaean church was in
Seleucia-Ctesiphon. Mani dedicated his only
Middle Persian writing, the
Shāpuragān, to
Shapur I.
Judaism The
Jewish community of Babylonia came to prominence in the 3rd century CE as a center of Jewish scholarship owing to the decline of the
Jewish population in the
Land of Israel. The
Jewish–Roman wars, the
Crisis of the Third Century, and Rome's conversion to Christianity all led to an increase in Jewish immigration to Asoristan, and the region became the main center of Judaism in late antiquity. This set the stage for the composition of the major book defining
Rabbinic Judaism, the
Babylonian Talmud, which was written in
Jewish Babylonian Aramaic in Asoristan between the 3rd and 5th centuries. The
Babylonian Talmudic academies were all established relatively near to Seleucia-Ctesiphon. The first Talmudic academy was founded in
Sura by
Rav (175–247) in about 220. One of the most influential Talmudic teachers,
Rava (270–350), who was influenced by both Manichaean polemic and Zoroastrian theology, studied in another Talmudic academy at
Pumbedita.
Zoroastrianism The Sasanian state religion,
Zoroastrianism, was largely confined to the Iranian administrative class, and did not filter down to the Assyrian-Babylonian population. ==References==