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
University of Piraeus an M.B.A. or a M.Sc. degree at its completion: The institution is home to the University of Piraeus Research Center (UPRC) which, since its founding in 1989, has participated in technological research on a national and international level, particularly in areas related to networking and internet technology. In addition, many cooperation agreements under the Erasmus +, as well as other bilateral cooperation agreements and interuniversity provided, exchange of students and staff, exchange of teaching and research material and conduct joint research projects and conferences. Moreover, the university is a member of international organizations such as European University Association, AACSB, International