Piraeus is a city with a rich history and significant modern importance. It is the main port of Greece and one of the largest in the Mediterranean, serving as a key hub for ferry connections to the Aegean Islands and Crete. The history of Piraeus dates back to antiquity, when it developed as the main port of ancient Athens. Today, a large part of the city has been designated an archaeological site, including the ancient city within the walls, as defined by the Central Archaeological Council (KAS). In the modern era, Piraeus is the largest passenger port in Europe, serving over 20 million passengers annually. Furthermore, it is a major commercial center, with its port ranking as the fourth largest commercial port in Europe.