450-350 BC Ancient Greece Mesembria in Thrace AE15 Ancient Grades vf+. Mesembria was an important Greek city in ancient Thrace. It was situated on the coast of the Euxine and at the foot of Mount Haemus. Bronze and silver coins were minted in the city since the 5th century BCE and gold coins since the 3rd century BCE. The town fell under Roman rule in 71 BCE, yet continued to enjoy privileges such as the right to mint its own coinage.