Ancient Histria or Istros (Ἰστρίη, Thracian river god, Danube), was a Greek colony or polis (πόλις, city) on the Black Sea coast, established by Milesian settlers to trade with the native Getae. It became the first Greek town on the present day Romanian territory. Scymnus of Chios (ca 110 BC), the Greek geographer and poet, dated it to 630 BC. Eusebius of Caesarea, some centuries later, dated its founding to 657 – 656 BC, at the time of the 33rd Olympic Games. The earliest documented currency on Romanian territory was an 8-gram silver drachma, issued in Histria in the year 480 BC.

(http://en.wikipedia.org/wiki/Histria_%28ancient_city%29)

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)

Geographic setting.

Ancient Histria was situated on a peninsula, about 5 kilometres (3 mi) east of the modern Romanian commune of Istria, on the Dobruja coast. The ancient seashore has since been transformed into the western shore of Sinoe Lake, as the Danube's silt deposits formed a shoal which closed off the ancient coastline. The current Sinoe Lake was at the time the open northern bay, while another bay on the southern shore served as the port. The acropolis with sanctuaries was established on the highest point of the coastal plain. The settlement itself, erected in the 6th century, was 1/2 mile (800 meters) to the west of the acropolis. The settlement had stone paved streets and was protected by strong wall. Water was collected along 12.5 mile (20 km) long aqueducts.

(http://en.wikipedia.org/wiki/Histria_%28ancient_city%29)