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 popular events in Piraeus is the Ecocinema International Film Festival, staged annually in late February. During this event, a number of films are screened at the Atticon Cinema and the Cineac Cinema, both of which are to be found within the city's Town Hall Square. In the summer, the Maritime Festival and the Piraeus Rock Wave Festival take place, while the Three Kings' Way Festival marks the beginning of the carnival, with all the associated costumes and entertainment. The Municipal Theater of city has been the center of the arts in Piraeus, hosting a variety of cultural events including theater,