Three poleis - Tripoli

By the fifth century B.C., Carthage, the greatest of the overseas Phoenician colonies, had extended its hegemony across much of North Africa, where a distinctive civilization, known as Punic, came into being. Punic settlements on the Libyan coast included Oea (Tripoli), Labdah (later Leptis Magna), and Sabratah, in an area that came to be known collectively as Tripolis, or "Three Cities".

read more http://countrystudies.us/libya/5.htm Libya, by Helen Chapin Metz, ed. Libya: A Country Study. Washington: GPO for the Library of Congress, 1987.

Tripoli is the mondern town corresponding to the old Oea, one of the three old Phoenician towns along the coast of Tripolitania, in Libya. http://www.livius.org/oa-om/oea/oea.html