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
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