Piraeus of social problems also emerged with the concentration of new populations in the suburbs of the old city, such as Nikaia, Keratsini, Drapetsona and Korydallos. The involvement of Greece in World War II came as a major setback to the city's progress. After the war, the city began its development once more, as damage to the port and the city were repaired and new additions took shape after 1955. Piraeus is now the third largest municipality in Greece; the city proper with its suburbs form the Piraeus urban area, which is incorporated in the Athens urban area, thus making Piraeus
Ethnikos Piraeus the centre of Piraeus. Ethnikos Piraeus Ethnikos Piraeus (Greek: Εθνικός Πειραιώς) is a Greek multisport club based in Piraeus. It was founded in 1923. The full name of the club is Ethnikos Omilos Filathlon Pireos/Phalirou or Ethnikos OFPF (Greek: Εθνικός Όμιλος Φιλάθλων Πειραιώς-Φαλήρου/Εθνικός ΟΦΠΦ), which means "National Club of Fans of Piraeus and Phalerum". Ethnikos has sections in football, basketball, volleyball, waterpolo, swimming and field hockey. In most of these sports, Ethnikos has won titles and honours. The most successful section is the water polo, which has won many titles in both men's (most Greek championships) and women's teams. Nevertheless,