A pentapolis, from the Greek words (pente), "five" and (polis), "city(-state)" is a geographic and/or institutional grouping of five cities. Cities in the ancient world probably formed such groups for political, commercial and military reasons, as happened later with the Cinque Ports in England.

A pentapolis, from the Greek words (pente), "five" and (polis), "city(-state)" is a geographic and/or institutional grouping of five cities. Cities in the ancient world probably formed such groups for political, commercial and military reasons, as happened later with the Cinque Ports in England.