 The site of Cyzicus, located on the Erdek and Bandırma roads, is protected by Turkey's Ministry of Culture.The city was said to have been founded by Pelasgians from Thessaly, according to tradition at the coming of the Argonauts; later it received many colonies from Miletus, allegedly in 756 BC, but its importance began near the end of the Peloponnesian War when the conflict centered on the sea routes connecting Greece to the Black-Sea.At this time, the cities of Athens and Miletus diminished in importance while Cyzicus began to prosper.