Classical Athens was a powerful city -state that emerged in conjunction with the seagoing development of the port of Piraeus, which had been a distinct city prior to its 5th century BCE incorporation with Athens. A centre for the arts, learning and philosophy, home of Plato's Academy and Aristotle's Lyceum, it is widely referred to as the cradle of Western civilization and the birthplace of democracy, largely because of its cultural and political impact on the European continent, and in particular the Romans. In modern times, Athens is a large cosmopolitan metropolis and central to economic, financial, industrial, maritime, political and cultural life in Greece. In 2012, Athens was ranked the world 's 39th richest city by purchasing power and the 67th most expensive in a UBS study.
Athens is a global city and one of the biggest economic centres in southeastern Europe. It has a large financial sector, and its port Piraeus is both the largest passenger port in Europe, and the second largest in the world. The Municipality of Athens (also City of Athens) had a population of 664,046 (in 2011) within its administrative limits, and a land area of 38.96 km2 (15.04 sq mi). The urban area of Athens (Greater Athens and Greater Piraeus) extends beyond its administrative municipal city limits, with a population of 3,090,508 (in 2011) over an area of 412 km2 (159 sq mi). According to Eurostat in 2011, the functional urban area (FUA) of Athens was the 9th most populous FUA in the European Union (the 6th most populous capital city of the EU), with a population of 3.8 million people.
