Histria or Istros, was a Greek colony or polis founded by Milesian settlers in the 7th cetury BC near the mouths of the Danube (known as Ister in Ancient Greek) on the western coast of the Black Sea. Histria is derived from the Latin word "Hister", meaning "Danube". It was under Roman rule from the 1st to 3rd centuries AD. Invasions during the 7th century AD rendered it indefensible, and the city was abandoned.
Modern location: ruins close to Istria, Romania