Ancient Orraon was founded and fortified between 385 and 370 B.C., when Alketas was the king of the Molossoi or, at the latest, in the second quarter of the 4th century B.C. The settlement was destroyed by the Romans in 167 B.C., was subsequently rebuilt and was finally abandoned by its inhabitants who were obliged to settle in Nicopolis, a city founded by Augustus after his victory in the battle of Actium, in 31 B.C.