Ptolemais Hermiou or Ptolemais in the Thebaid was a city in Greco-Roman Egypt, established on the west bank of the Nile at the site of the Egyptian village of Psoï in the Thinisnome by Ptolemy I Soter sometime after 312 BCE to be the capital of Upper Egypt. Today, the city of Al Manshah in the Sohag Governorate is located where the ancient city used to be. According to Strabo, it was the largest city in the Thebaid, equal to Memphis in size. It also had its own constitution, an assembly with elected magistrates and judges alike a traditional Greek polis. Greek settlers to the city where brought over from the Peloponnese and northern Greece. The city housed temples to Greek and Egyptian gods (Zeus, Dionysus, Isis) as well as a cult for the worship of the Ptolemaic Dynasty. There was also a theater and actor's guild present in the city. Ptolemy, the Alexandrian astronomer and geographer (ca. A.D. 90-168), was born in this city.