Athens is one of the oldest named cities in the world, having been continuously inhabited for at least 5000 years. Situated in southern Europe, Athens became the leading city of Ancient Greece in the first millennium BC and its cultural achievements during the 5th century BC laid the foundations of western civilization.
During the early Middle Ages, the city experienced a decline, then recovered under the later Byzantine Empire and was relatively prosperous during the period of the Crusades (12th and 13th centuries), benefiting from Italian trade. Following a period of sharp decline under the rule of the Ottoman Empire, Athens re-emerged in the 19th century as the capital of the independent Greek state.