About Piraeus:
Piraeus (/paɪˈriːəs, pɪˈreɪəs/ py-REE-əs, pirr-AY-əs; Greek: Πειραιάς Peiraiás [pireˈas]; Ancient Greek: Πειραιεύς Peiraieús [peːrai̯eús]) is a port city within the Athens urban area ("Greater Athens"), in the Attica region of Greece. It is located in the Athens Riviera, 8 kilometres (5 miles) southwest of Athens’ city centre, along the east coast of the Saronic Gulf.

The municipality of Piraeus and four other suburban municipalities form the regional unit of Piraeus, sometimes called the Greater Piraeus area, with a total population of 448,997. At the 2011 census, Piraeus had a population of 163,688 people, making it the fifth largest municipality in Greece and the second largest (after the municipality of Athens) within the Athens urban area.

Piraeus has a long recorded history, dating back to ancient Greece. The city was founded in the early 5th century BC, when plans to make it the new port of Athens were implemented: A prototype harbour was constructed, which resulted in concentrating in one location all the import and transit trade of Athens, along with the navy's base. During the Golden Age of Athens, the Long Walls were constructed to fortify the route from the main settlement to the port (Piraeus). During Athens’ Classical period, the naval base in Piraeus had 372 trireme shipsheds. Beginning in the 3rd century B.C., Piraeus gradually declined, and eventually became essentially deserted. However, it began growing again in the 19th century, after Athens was made the capital of Greece. Today, Piraeus is a large city, bustling with activity, and an integral part of Athens. It is a huge marine and commercial-industrial centre, and home to Greece’s largest harbor.

The port of Piraeus is the chief port in Greece, the largest passenger port in Europe and the second largest in the world, serving about 20 million passengers annually. With a throughput of 1.4 million TEUs, Piraeus is among the busiest ten ports in Europe in terms of container traffic, and is the busiest container port in the Eastern Mediterranean. The municipality hosted events in both the 1896 and 2004 Summer Olympics held in Athens. The University of Piraeus is one of the largest universities in Greece, and includes the country's second-oldest business school, as well as the oldest academic department dedicated to the study of finance.

Piraeus is situated in the southwest part of the central plain of Attica, also widely known as the Athens or Attica Basin, which the Athens urban area (or agglomeration) sprawls across. Piraeus is bounded by the Mount Aigaleo to the northwest, and the Saronic Gulf to the south and west, and connected with the rest of the Athens urban area to the east and northeast. The "city proper" of Piraeus consists of a rocky peninsula, originally an island, featuring three natural harbors. In addition to the central one, called Kantharos in ancient times, the smaller harbours to the east are still in use: Zea, also known as Pasalimani, and Munichia, the smallest of the three and widely known as Mikrolimano and Tourkolimano . Nowadays, the Greater Piraeus includes the harbours of Drapetsona, Keratsini and Perama. The central harbour is a hub of commercial and passenger shipping, whereas the two smaller ones cater to recreational and fishing craft. The municipality has an area of 10.865 km2.


Source: Wikipedia
https://en.wikipedia.org/wiki/Piraeus