structural:summarization
Seleucid period

Susa lost much of its importance after the invasion of Alexander the Great of Macedon in 331 BC. In 324 BC he met Nearchus here, who explored the Persian Gulf as he returned from the Indus River by sea. In that same year Alexander celebrated in Susa with a mass wedding between the Persians and Macedonians.

The city retained its importance under the Seleucids for approximately one century after Alexander, however Susa lost its position of imperial capital to Seleucia on the Tigris to become the regional capital of the satrapy of Susiana. Nevertheless, Susa retained its economic importance to the empire with its vast assortment of merchants conducting trade in Susa, using Charax Spasinou as its port.

The city was named Seleucia on the Eulaeus or Seleucia ad Eulaeum.

Seleucus I Nicator minted coins there in substantial quantities. Susa is rich in Greek inscriptions, perhaps indicating a significant number of Greeks living in the city. Especially in the royal city large, well-equipped peristyle houses have been excavated.