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
Port of Thessaloniki Port of Thessaloniki The Port of Thessaloniki () is one of the largest Greek seaports and one of the largest ports in the Aegean Sea basin, with a total annual traffic capacity of 16 million tonnes (7 million tonnes dry bulk and 9 million tonnes liquid bulk). As a free port, it also functions as a major gateway for the Balkan hinterland and southeastern Europe. The Port of Thessaloniki also contains the second largest container port in Greece, after the Port of Piraeus. In 2007 the Port of Thessaloniki handled 14,373,245 tonnes of cargo and 222,824 TEU's, making it one