Iran in the Hellenistic Age
From Alexander's conquest to Parthian expansion, follow political rupture alongside the survival and adaptation of Achaemenid, Iranian, Babylonian, and Greek institutions.
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Part 1
Alexander defeated Darius III at Gaugamela in 331 BCE and entered Babylon, Susa, and Persepolis. The Achaemenid monarchy had lost its principal centers, but resistance and campaigning continued; conquest was a process, not a single instant of collapse.
- Alexander the Great — Encyclopaedia Iranica
Part 2
In 330 BCE, Alexander's army looted and burned parts of Persepolis. Ancient writers offered different motives, from deliberate revenge to a drunken impulse, and certainty is impossible. The destruction was severe, although the site and its archives did not vanish from history.
- Alexander the Great — Encyclopaedia Iranica
- Persepolis — Encyclopaedia Iranica
Part 3
Alexander increasingly adopted Achaemenid court ceremony, dress, offices, and provincial boundaries while retaining Macedonian power at the center. These choices helped him govern former Achaemenid lands, but they do not establish a Magian coronation or secret priestly control of his reign.
- Alexander the Great — Encyclopaedia Iranica
- Achaemenid Satrapies — Encyclopaedia Iranica
Part 4
After Alexander died in 323 BCE, his commanders fought over his conquests. Seleucus built a new empire from Babylonia beginning in 312/311, eventually claiming much of the former Achaemenid realm. Seleucid rule combined Greco-Macedonian monarchy with local institutions and regional elites.
- Seleucid Empire — Encyclopaedia Iranica
Part 5
The Hellenistic age intensified encounters among Greek, Iranian, and Babylonian traditions. Greek writers associated Zoroaster and the Magi with ancient wisdom, and some philosophical comparisons are plausible. Yet later claims that named philosophers studied with Magi cannot securely document direct borrowing.
- Greece III. Persian Influence on Greek Thought — Encyclopaedia Iranica
- Magi — Encyclopaedia Iranica
Part 6
Seleucid conflicts in the west coincided with growing autonomy in the east. In the mid-third century BCE, Parni groups under Arsaces entered Parthia and established power there. Accounts of Arsaces's ancestry conflict, though the tradition of a Parni chief has supporting evidence.
- Seleucid Empire — Encyclopaedia Iranica
- Arsacids I. Origins — Encyclopaedia Iranica
Part 7
Mithridates I took Media in 148 BCE and Babylonia in 141, making the Arsacids the leading power in Iran and Mesopotamia. Later Arsacid rulers claimed Achaemenid descent and revived some court protocols. The imperial term Ērānšahr, however, is first attested under the Sasanians and should not be projected back onto Parthian rule.
- Seleucid Empire — Encyclopaedia Iranica
- Arsacids I. Origins — Encyclopaedia Iranica
- Ērān, Ērānšahr — Encyclopaedia Iranica