Athens (/ˈæθɨnz/; Modern Greek: Αθήνα, Athína, [aˈθina]; Ancient Greek: Ἀθῆναι, Athēnai) is the capital and largest city of Greece. Athens dominates the Attica region and is one of the world’s oldest cities, with its recorded history spanning around 3,400 years, and the earliest human presence around the 11th–7th millennium BC. Classical Athens was a powerful city-state that emerged in conjunction with the seagoing development of the port of Piraeus. 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 due to the impact of its cultural and political achievements during the 5th and 4th centuries BC on the rest of the then known European continent. Today a cosmopolitan metropolis, modern Athens is central to economic, financial, industrial, political and cultural life in Greece. In 2012, Athens was ranked the world’s 39th richest city by purchasing power and the 77th most expensive in a UBS study.