Piraeus is a city located in the southern part of Greece, on the coast of the Aegean Sea. It is the largest port and the busiest seaport in Greece, serving as a major hub for maritime trade and transportation. The city was founded in ancient times and has been an important center of commerce, culture, and politics throughout history. Today, Piraeus is a major urban area with a population of over 400,000 people. The city is home to several universities, museums, and cultural institutions, and attracts tourists from all over the world who come to visit its historic landmarks and enjoy its vibrant atmosphere.