Lands and Peoples of the Parthian Empire

From its emergence around 247 BCE to the Sasanian takeover in 224 CE, the Arsacid dynasty linked its northeastern Iranian homeland of Parthia with a realm extending from Central Asian districts to Mesopotamia, chiefly in modern Iraq, and the Armenian highlands. The word Parthian could identify that homeland, the ruling house, or people and institutions associated with a much wider empire. Across this territory, Arsacid authority connected cities, regional dynasties and communities with distinct local histories. The Parthian empire encompassed regions that retained different institutions and political relationships.

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Parthia, the Parni and Hyrcania

The Arsacids emerged from the Parni, one of the Dahae groups associated with the steppe north of Iran. Around 250 BCE, the Parni under Arsaces entered Astauene, probably the Atrek valley in northeastern Iran. Arsaces was proclaimed king at Asaak, whose location remains unknown, probably around 247 BCE. The Greek-led Seleucid kingdom, one of the successor dynasties formed after Alexander’s conquests, ruled Parthava. Around 245 BCE its governor Andragoras declared the province independent; around 238 BCE the Parni invaded, killed him and took Parthava, then occupied Hyrcania. The name Parthian spread from the conquered province to the expanding Arsacid dynasty and realm, while the population under its rule remained diverse.

Old Nisa, near modern Ashgabat in Turkmenistan, served as an official residence between the third and first centuries BCE. Excavations uncovered palaces and temples built with local sun-dried mudbrick, or adobe, and Greek-influenced Hellenistic decoration, alongside a royal wine storehouse. Its archive held more than 2,000 ostraca, short notes written on potsherds. These recorded wine deliveries; their contents were entered into a permanent running account, probably on parchment. Some ostraca were leases of royal vineyards, connecting land rights and delivery records to the storehouse. The Nisa remains preserve this royal setting.

Hyrcania lay southeast of the Caspian Sea, north of the Alborz range. The Alborz’s northern slopes were forested, and the plain was well watered and fertile near the mountains before giving way to desert steppe farther inland. Hyrcania was both a settled agricultural region and a corridor between the plateau and the steppe.

The plateau road and eastern districts

West of Parthia, Media joined the plateau to Mesopotamia through the Zagros Mountains. Ecbatana, at modern Hamadan in western Iran, stood below Mount Alvand on a fertile plain. Orchards and vegetables grew near the city, with grain fields and pastoral country beyond. A major east–west road crossed the central Zagros, giving the city a position on routes between the Iranian uplands and the Tigris plain.

The Greek geographer Isidore of Charax described a route east from Zeugma on the Euphrates through Seleucia on the Tigris, Ecbatana, Rhagae, Nisa, Margiana, Aria, Sistan and Arachosia. His Parthian Stations lists stopping places and distances, and marks provincial transitions. Scholars associate its political geography with the reign of the Parthian king Mithridates II, around 124/3–88/7 BCE.

Those eastern names cover distinct regions. Margiana, centred on Marv in modern Turkmenistan, lay north of Aria, around Herat in western Afghanistan. Farther south, Sakastan, or Sistan, crossed parts of present-day Iran and Afghanistan; Arachosia was centred near Kandahar. Saka groups moved south from Central Asia around the mid-second century BCE. Coin evidence traces movements from Bactria to the Parthian eastern borderlands between about 120 and 80 BCE; part of Drangiana took the name Sakastan, or “land of the Sakas.”

Mesopotamia, cities and regional powers

The Tigris and Euphrates plains brought irrigated farming, dense settlement and river traffic into the Arsacid realm. Seleucia on the Tigris stood near the northern end of the river’s navigable course. The King’s Canal connected it with the Euphrates, carrying boats and water between the river systems. Across the Tigris, Ctesiphon became an Arsacid royal residence and winter seat. Seleucia retained civic institutions and a mint, while the paired cities connected overland routes, river transport and trade moving toward the Persian Gulf.

Hatra, in northern Iraq, occupied a different position. It was a fortified city on caravan routes linking Mesopotamia with Syria and Anatolia, and appears to have become the seat of a local dynasty in the first century CE. Its rulers exercised local authority as dynasts and, later, as kings subordinate to the Parthian King of Kings. Inscriptions call the later rulers “king of Arab,” while Hatra’s sanctuaries and urban life reflect its own regional community.

In the southwest, the Parthians took Susa around 140 BCE and held it at least until 45 CE; Elymean rulers controlled the city from the later first century, and it returned to Parthian hands in 215. Greek civic institutions continued under Parthian rule into the first century CE. In a letter of 21/22 CE, Artabanus II confirmed Hestiaios son of Asios as treasurer after the city reelected him, despite rules against immediate succession to the office. Hestiaios had distinguished himself in office and represented Susa on embassies, so the city had reason to seek the king’s support. Persis, Elymais and Characene also had regional dynasties. Their rulers issued coins in their own domains, sometimes replacing Arsacid issues there. Local rulers did not all hold the same degree of independence.

Armenia and communities across the realm

Armenia lay between the Roman and Iranian spheres and retained its own royal house and aristocracy, with its status negotiated through kingship. The settlement at Rhandeia in 63 CE recognized Tiridates, an Arsacid prince, as king; Nero crowned him in Rome in 66. This arrangement tied Armenian kingship to the Parthian dynasty while making its legitimacy part of Roman diplomacy.

The population of the empire was similarly varied. Dura-Europos, on the middle Euphrates in modern Syria, entered the Iranian sphere after a Parthian conquest around 113 BCE. A brief Roman occupation in 115–117 interrupted Parthian rule, which lasted until Rome took the city in 165. Its inscription record spans these successive periods: alongside Greek, Latin and Aramaic are Iranian-language traces. A Parthian graffito dated March 211 or 212 belongs to the Roman period; Middle Persian synagogue graffiti are interpreted as dating to Shapur I’s 14th and 15th regnal years, while separate Pahlavi graffiti from the palace of the Dux Ripae are linked to a Persian detachment after the Sasanian capture in 256.

In Babylonia and the western satrapies, or provinces, Jewish communities lived among Babylonian, Greek and Iranian populations, with some also farming beyond the cities. The first prominent Babylonian rabbis, Jewish religious teachers and legal scholars, were born in the third quarter of the second century CE, decades before the Arsacid monarchy ended in 224; their later intellectual life developed under Iranian rule as well. Babylonian scribes continued to write cuneiform well into the Seleucid and Parthian periods. Their dated records supplied material for king lists and chronological calculations.

Greek remained useful in civic affairs, royal dealings with Greek communities and coin legends, alongside Parthian and Aramaic; the regional writing record preserves examples of that use.