Pentapolis

This article may lack focus or may be about more than one topic. In particular, is this article about the word, the concept, or should it be a disambig page?. Please help improve this article, possibly by splitting the article and/or by introducing a disambiguation page, or discuss this issue on the talk page. (October 2010)

A pentapolis (from Greek πεντα- penta-, 'five' and πόλις polis, 'city') 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.