Aramaic was the “official” written langauge of the Achaemenian Empire; after the conquests of Alexander the Great, Greek, the language of the conquerors, replaced Aramaic. Under the Seleucids, however, both Greek and Aramaic were used throughout the empire, although Greek was the principal language of government. Gradually Aramaic underwent changes in different parts of the empire, and in Mesopotamia in the time of the Parthians it evolved into Syriac, with dialectical differences from western Syriac, used in Syria and Palestine. In southern Mesopotamia, other dialects evolved, one of which was Mandaic, the scriptural language of the Mandaean religion.
Literature in local languages is nonexistent, except for copies of ancient religious texts in cuneiform writing and fragments of Aramaic writing. There were authors who wrote in Greek, but little of their work has survived and that only as excerpts in later works. The most important of these authors was Berosus, a Babylonian priest who wrote about the history of his country, probably under Antiochus I (reigned 281–261 bce). Although the excerpts of his work that are preserved deal with the ancient, mythological past and with astrology and astronomy, the fact that they are in Greek is indicative of interest among local Greek colonists in the culture of their neighbours. Another popular author was Apollodorus of Artemita (a town near Seleucia), who wrote under the Parthians a history of Parthia in Greek as well as other works on geography. Greek continued to be a lingua franca used by educated people in Mesopotamia well into the Parthian period.
Under the Seleucid system of dating, as far as is known, a fixed year became the basis for continuous dating for the first time in the Middle East. The year chosen was the year of entry of Seleucus into Babylon, 311 bce according to the Mesopotamian reckoning and 312 bce according to the Syrians. Before this time, dating had been only according to the regnal years of the ruling monarch (e.g., “fourth year of Darius”). The Parthians, following the Seleucids, sought to institute their own system of reckoning based on some event in their past that scholars can only surmise—possibly the assumption of the title of king by the first ruler of the Parthians, Arsaces.
Since Greece was overpopulated at the beginning of Seleucid rule, it was not difficult to persuade colonists to come to the east, especially when they were given plots of land (cleroii) from royal domains that they could pass on to their descendants; if they had no descendants, the land would revert to the king. Theoretically all land belonged to the ruler, but actually local interests prevailed. As time passed, however, the influx of Greek colonists diminished and then ended when the wars of the Hellenistic kings interrupted this movement. Nonetheless, Greek influences continued, and it is fascinating to find in cuneiform documents records of families where the father has a local name and his son a Greek one and vice versa. Inasmuch as Mesopotamia was peaceful under the Seleucids, the processes of accommodation and assimilation among the people appear to have flourished.
The Parthian period
The coming of the Parthians changed Mesopotamia even less than the establishment of the Seleucid kingdom had, for as early as the middle of the 2nd century bce local dynasts had proclaimed their independence. There is no evidence indicating whether the cities of Mesopotamia surrendered piecemeal or all at once or whether they submitted voluntarily or after fighting. In any case, Seleucia was treated better by the Parthians than it had been by the Seleucids, and the local government retained its autonomy. Parthian troops did not occupy Seleucia but remained in a garrison site called Ctesiphon near Seleucia; it later grew into a city and replaced Seleucia as the capital. In Characene in southern Mesopotamia a Seleucid satrap with an Iranian name, Hyspaosines, issued coins about 125 bce, a sign of his independence; the actual date for this may have been earlier. He changed the name of the city Antiochia on the lower Tigris to Spasinou Charax, meaning “The Fort of Hyspaosines,” and made it his capital. All the coins issued from his capital have Greek legends. His troops moved north and occupied Babylon and Seleucia probably sometime in 127 bce, when the Parthians were fighting nomadic invaders in the eastern part of their territory. His rule there must have been short, however, for the Parthian governor of Babylon and the north, Himerus, was back in Seleucia and Babylon by 126. Himerus could not have been a rebel, since he struck coins in the name of the Parthian rulers Phraates II and Artabanus II, both of whom were killed in fighting in eastern Iran. Himerus abused his power and is said to have oppressed the cities of Mesopotamia, plundering them and killing their inhabitants. Cuneiform documents from Babylon stop after this date, indicating that the city did not survive the depredations of Himerus. He vanished, however, and Parthian sovereignty was restored by the ninth Arsacid king, Mithradates II, who came to the throne about 124 bce; he was the son of Artabanus II. Mithradates II recovered all Mesopotamia and conquered Characene, overstriking coins of Hyspaosines and driving him from his capital in 122 or 121 bce. By 113, if not earlier, Dura-Europus on the Euphrates was in Parthian hands. In 95 bce the Armenian Tigranes II, a hostage at the court of Mithradates, was placed on the throne of Armenia by his Parthian overlord, and the small kingdoms of northern Mesopotamia—Adiabene, Gordyene, and Osroene—gave allegiance to Mithradates. Mithradates II died about 87 bce, although he may have died earlier, since the period after 90 bce is dark and a usurper named Gotarzes may have ruled for a few years in Mesopotamia. During the reign of Mithradates II the first contacts with Rome, under Lucius Cornelius Sulla, were made, and portents of future struggles were evident in the lack of any agreement between the two powers. Sulla was sent to the east by the Roman Senate to govern Cilicia in Anatolia. In 92 bce Orobazes, an ambassador from Mithradates II, came to him seeking a treaty, but nothing was concluded, since instructions from Rome did not include negotiations with the Parthian power.
Tigranes II took advantage of struggles between several claimants to the Parthian throne to expand Armenian territory into Mesopotamia, and the small states in the north gave him their allegiance. It was not until 69 bce, when the Roman general Lucius Licinius Lucullus captured Tigranokerta, Tigranes’ capital, that Mesopotamia returned to Parthian rule. Thereafter wars between the Romans and the Parthians were to dominate the political history of Mesopotamia.
The Parthians left the local administrations and rulers intact when they conquered Mesopotamia. According to Pliny the Elder (Natural History VI, 112) the Parthian empire consisted of 18 kingdoms, 11 of which were called the upper kingdoms (or satrapies), while 7 were called lower kingdoms, meaning that they were located on the plains of Mesopotamia. The centre of the lower kingdoms was ancient Babylonia, called Beth Aramaye in Aramaic, and it was governed directly by the Parthian ruler. In the south was Characene, while to the northeast of Ctesiphon, which had supplanted Seleucia as the Parthian capital, was Garamea, with its capital at modern Kirkūk. Adiabene had Arbela as its capital, and farther north was a province called Beth Nuhadra in Aramaic, which seems to have been governed by a general who was directly responsible to the Parthian king, because this province bore the brunt of Roman invasions. Nisibis was the main city of the desert area of Arabistān, but at the end of the Parthian period the desert caravan city of Hatra claimed hegemony over this area. There were other principalities in the northwest: Sophene, where Tigranes’ capital was located; Gordyene and Zabdicene (near modern Çölemerik in eastern Turkey), located to the east of Sophene; and Osroene, with its capital Edessa (modern Urfa, Turkey), which lay inside the Roman sphere of influence. Rule over so many small kingdoms gave Mithradates II the title “King of Kings,” also borne by later Parthian rulers.