Colonists from Megara (c. 667 BC) founded Byzantium.
In the Peloponnesian War, (c. 431 BC-404 BC) Megara was an ally of Sparta.
... At the time of Justinian, he was a Christian and possibly bishop of Croton. In approximately 580, he wrote "De origine actibusque Getarum[?]" (The origin and deeds of ...