PREVESA, the chief town of a sandjak in the Turkish vilayet of Janina, commanding the entrance to the Gulf of Arta. Its harbour is small, but it is a port of call for the steamers of the Austrian Lloyd and has a considerable trade in the export of oil, wool, valonia, &c. Prevesa, which represents the ancient Nicopolis (q.v.), has a population of about 7000.