The Parthian name Asōristān is known from Shapur I's inscription on the Ka'ba-ye Zartosht, and from the inscription of Narseh at Paikuli. The adjective āsōrīg in Middle Persian accordingly means “Assyrian”. The region was also called several other names: Assyria, AthuraBēṯ Aramāyē, Bābēl / Bābil, and Erech / Erāq. After the mid-6th century it was also called Khvārvarān in Persian. The name Asōristān is a compound of Asōr and the Iranian suffix -istān. The name Assyria, in the form Asōristān, was shifted to include ancient Babylonia by the Parthians, and this continued under the Sasanians. The historical country of Assyria, however, lay to the north of Babylonian Asoristan, in the independent frontier province of Osroene.
History
During the Achaemenid and Parthian Empires, this region had been known by the Old Persian name Athura. Asōristān, Middle Persian "land of Assyria", was the capital province of the Sasanian Empire and was called Dil-ī Ērānshahr, meaning "Heart of Iran". The city of Ctesiphon served as the capital of both the Parthian and Sasanian Empire, and was for some time the largest city in the world. The main language spoken by the Assyrian people was Eastern Aramaic, with the localSyriac language becoming an important vehicle for Syriac Christianity. The Church of the East was founded in Asōristān. Asōristān was largely identical with ancient Mesopotamia. The northern border is somewhat uncertain but probably went along a line from Anta to Takrīt. Ḥīra was probably the southernmost point, the border then following the northern part of the swamps of Wasit. The Parthians had exercised only loose control at times, allowing for a number of Syriac-speaking Assyrian kingdoms to flourish in Upper Mesopotamia, the independent Osroene, as well as the districts of Adiabene and the partly Assyrian state of Hatra. The Sasanian Empire conquered Assyria and Mesopotamia from the Parthians during the 220s, and by 260 had abolished these city-states, with the 3000-year-old city of Assur being sacked in 256. Some regions appear to have remained partly autonomous as late as the latter part of the fourth century, with an Assyrian king named Sinharib reputedly ruling a part of Assyria in the 370s. Between 633-8, the region was invaded by the Arabs during the Muslim conquest of Persia; together with Meshan, it became the province of al-ʿIrāq. Asōristān was devolved by 639, bringing an end to over 3000 years of Assyria as a geopolitical entity. A century later, the area became the capital province of the Abbasid Caliphate and the centre of Islamic Golden Age for five hundred years, from the 8th to the 13th centuries. After the Muslim conquest, Asōristān saw a gradual but large influx of Muslim peoples; at first Arabs, but later also including Iranian and Turkic peoples. The Assyrian peoples continued to endure, rejecting Arabization and Islamization, and continued to form the majority population of the north as late as the 14th century, until the religiously-motivated massacres of Timur drastically reduced their numbers and led to the city of Assur being finally abandoned. After this period, the Assyrians became the ethnic, linguistic and religious minority in their homeland that they are to this day.
Population
The population of Asorestan was a mixed one, the north was composed mostly of indigenous Assyrians, while the ethnically and linguistically identical Babylonians lived in the south, Arameans and Nabateans dwelt in the far southwestern deserts, and Persians, Armenians, Jews and Mandeans lived throughout Mesopotamia. The Greek element in the southern cities, still strong in the Parthian period, was absorbed by the Semites in Sasanian times. The majority of the population were Assyrian people, speaking Eastern Aramaic dialects. As the breadbasket of the Sasanian Empire, most of the population were engaged in agriculture or worked as soldiers, traders and merchants. The Persians lived in various parts of the province; Persian garrison soldiers lived along the outer fringe of southern and western Asoristan, Persian noble families lived in the major cities, whilst some Persian peasants lived in the villages in the southern part. They played a very active role in the province, and were found in the administrative class of society, as army officers, civil servants, and feudal lords.
Language
At least three dialects of Eastern Aramaic were in spoken and liturgical use: Syriac mainly in the north and among Assyrian Christians, Mandaic in the north and then south and among the Mandaeans, and a dialect in the central region, of which the Judaic subvariety is known as Jewish Babylonian Aramaic. In addition, the native population spoke colloquial dialects of Akkadian infused and influenced Mesopotamian Eastern Aramaic, descended from the Imperial Aramaic introduced by Tiglath-pileser III as the lingua franca of Assyria and the Neo Assyrian Empire in the 8th century BC. These dialects survive to this day among the modern Assyrians, with estimates ranging from 577,000 to 1,000,000 fluent speakers, with a far smaller number of speakers of Mandaic still extant. Aside from the liturgical scriptures of these religions which exist today, archaeological examples of all three of these dialects can be found in the collections of thousands of Aramaic incantation bowls—ceramic artifacts dated to this era—discovered in Iraq. While the Jewish Aramaic script retained the original "square" or "block" form of the Aramaic alphabet used in Imperial Aramaic, the Syriac alphabet and the Mandaic alphabet developed when cursive styles of Aramaic began to appear. The Mandaic script itself developed from the Parthian chancellery script.
The old Mesopotamian religion of the indigenous Assyrians and Babylonians remained strong in places, particularly in the north, in Assyria proper. Temples were still being dedicated to Ashur, Shamash, Ishtar, Sin, Hadad and Ninurta in Assur, Arbela, Edessa, Amid, Nohadra and Harran among other places, during the 3rd and 4th centuries AD, and traces would survive into the 10th century in remote parts of Assyria.
The Mandaean religion, whose adherents according to their traditions are the original followers of John the Baptist, and who are considered to be the only surviving Gnostic group in the world, also originated in the region at this time. Their language and script was the Mandaic form of Aramaic. Two of their central works, both written within the 2nd and 3rd centuries, are the Ginza Rabba and the Mandaean Book of John. The Mandean population numbers no more than 50,000 to 75,000 today.
Manichaeism
The religion of Manichaeism, founded by Mani, originated in 3rd century Asorestan, and spread across a vast geographical area. In some instances, Manichaeism even surpassed the 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, 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
Babylonia remained the center of Judaism in the world. The major book defining Rabbinic Judaism, the Babylonian Talmud, was written in Jewish Babylonian Aramaic in Asorestan 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 in about 220. One of the most influential Talmudic teachers, Rava, 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 population.
