Acropolis (Greek: akrópolis) is the Greek term which refers to the portion of a town or city that is built on a hilltop for easy defense. It comes from the Greek "acros" which means summit, and "polis" which means city. It literally translates to "the highest point of the city". In ancient Greece, there were many city-states for geographical reasons, and they often had an acropolis located in them. The Acropolis of Athens is the best known acropolis of the world; the Parthenon is located upon it.