Heracleium or Herakleion ( grc, Ἡράκλειον) was a town of

Bithynia Bithynia (; Koine Greek: , ''Bithynía'') 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, Pa ...

, on the

Propontis The Sea of Marmara,; grc, Προποντίς, Προποντίδα, Propontís, Propontída also known as the Marmara Sea, is an inland sea located entirely within the borders of Turkey. It connects the Black Sea to the Aegean Sea via the ...

. 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