Heracleium or Herakleion () was a town of

Bithynia Bithynia (; ) was an ancient region, kingdom and Roman province in the northwest of Asia Minor (present-day Turkey), adjoining the Sea of Marmara, the Bosporus, and the Black Sea. It bordered Mysia to the southwest, Paphlagonia to the northeast a ...

, on the

Propontis The Sea of Marmara, also known as the Sea of Marmora or the Marmara Sea, is a small inland sea entirely within the borders of Turkey. It links the Black Sea and the Aegean Sea via the Bosporus and Dardanelles straits, separating Turkey's E ...

. Its site is located near modern Ereğli, Asiatic Turkey.

References

Populated places in Bithynia Former populated places in Turkey History of Kocaeli Province {{Kocaeli-geo-stub