Port of Piraeus permanent navy base for the mighty Athenian fleet. However, in the late 4th century BC began a long period of decline for Piraeus; the harbours were only occasionally used for the Byzantine fleet and the city was mostly deserted throughout the Ottoman occupation of Greece. In 2002 PPA and the Greek government signed a concession agreement. The Greek government leased the port zone lands, buildings and facilities of Piraeus Port to PPA for 40 years. In 2008 the duration of the concession agreement was modified from 40 to 50 years. With this modification the lease is ending in 2052. Since
Piraeus derby the 1985–86 season and has not finished above Olympiakos in the league standings since the 1987–88 season. In the 1990s, when Olympiacos was experiencing probably the greatest era of its history while Ethnikos was suffering through what was surely its worst, Ethnikos lost some of its fanbase to Olympiakos. A recent point of contention for Ethnikos fans has to do with Karaiskakis Stadium. Karaiskakis is the traditional home of both Olympiakos and Ethnikos, but only Olympiacos has played there since the stadium was rebuilt for use in the 2004 Summer Olympics. Piraeus derby The Piraeus derby, is an association football