Histria Fortress, the Pompeii of Romania, was the oldest Greek settlement in Romania. Founded in the 7th Century BC by Greeks from Miletos, the richest city in Ionia (Asia Minor), this trading post soon became the main Greek port on the Black Sea. The city thrived for fourteen centuries, prospering under Roman and Byzantine occupation until invading forces wiped it off the map in the 7th century AD. The lost city features remains of Aphrodite's Temple, the Temple of Zeus, Roman baths and other public buildings from the Roman-Byzantine period. The nearby museum (Open: Tue. - Sun 9:00am - 8:00pm; Closed Mon.) houses a collection of coins, ceramic items and other vestiges of the great civilizations that thrived on the Black Sea coast, or Pontus Euxin's, at it was called in ancient times.

(http://www.romaniatourism.com/constanta.html)