Perinthus Perinthus ( Ancient Greek : Πέρινθος Périnthos , later called Heraclea , present-day Marmara Ereğli ) was an ancient town of Thrace , on the Propontis , 22 miles west of Selymbria , strongly situated on a small peninsula on the bay of that name . It is said to have been a Samian colony , founded about 599 BC . According to John Tzetzes , its original name was M ygdonia ; later it was called Heraclea ( Heraclea Thraciae , Heraclea Perinthus ) . It is famous chiefly for its stubborn and successful resistance to Philip II of Macedon in 340 BC ; at that time it seems to have been more important than Byzantium itself . This article incorporates text from the Encyclopædia Britannica Eleventh Edition , a publication now in the public domain .  This Ancient Greece -related article is a stub . You can help Wikipedia by expanding it .  This Greece location article is a stub . You can help Wikipedia by expanding it . Categories : Wikipedia articles incorporating text from the 1911 Encyclopædia Britannica | Thrace | Ancient Greece stubs | Greece geography stubs 