Mesembria

Mesembria, modern Nesebar in Bulgaria, was originally a Thracian settlement called Menebria ("town of Mena") before Greek colonists from Megara established it as a colony in the 6th century BC. Occupying a rocky Black Sea peninsula with natural defenses, it became an important trading hub and the only Dorian colony on the Black Sea coast. The city featured temples dedicated to Apollo, Zeus, and Athena, substantial fortification walls with towers, and minted its own coins from the 5th century BC. Now a UNESCO World Heritage Site, the peninsula preserves remains spanning from antiquity through the medieval period.