Piraeus Prefecture the Peloponnese. An indication of the geographical diversity of the prefecture was the stark difference in population density between its seven mainland municipalities in the Athens metropolitan area, which have 9,244.2 inhabitants/km², and its detached outlying areas, which average only 85.83 inhabitants/km² (and most of these on Salamis Island, at 395.40/km², while the far-outlying parts have only 47.80/km²). "Note:" Provinces no longer hold any legal status in Greece. Piraeus Prefecture Piraeus Prefecture () was one of the prefectures of Greece. It was part of the Attica region and the Athens-Piraeus super-prefecture (1994–2011). The capital of the prefecture was the city
Piraeus derby Piraeus derby The Piraeus derby, is an association football rivalry between Ethnikos Piraeus and Olympiacos, the 2 teams representing the city of Piraeus. Once a major derby, since Olympiakos' dominance the derby has lost importance over the years, however the rivalry still exists as the poaching of players and the ownership of the stadium still remain a point of contention. Although the importance of the derby has declined in football, the rivalry is still very much alive in other sports, especially water polo. Since the two clubs were established in the mid-1920s, Ethnikos' traditional local rival has been Olympiacos CFP,