"the port city of Piraeus"

Mikrolimano in Piraeus
Creative Commons AttributionMikrolimano in Piraeus - Credit: Templar52, Alaniaris
 Piraeus has existed since the 5th century BC as the port city for Athens, which is located 12km away. It sits on the Saronic Gulf and is the main point of entry for Greece by sea. It is the largest port in Europe and the third largest in the world, with around 20 million passengers passing through it annually.