Vienna, the capital of Austria, lies in the country’s east on the Danube River. Its artistic and intellectual legacy was shaped by residents including Mozart, Beethoven and Sigmund Freud. The city is also known for its Imperial palaces, including Schönbrunn, the Habsburgs’ summer residence. In the Museums Quartier district, historic and contemporary buildings display works by Egon Schiele, Gustav Klimt and other artists. Vienna has a population of about 1.8 million (1.6 million within the metropolitan area, nearly one third of Austria's population), and its cultural, economic, and political centre. Evidence has been found of continuous habitation since 500 BC, when the site of Vienna on the Danube River was settled by the Celts. 6.1 million tourists visited Vienna in 2014 amounting to 13,514,166 overnight stays. Art and culture had a long tradition in Vienna, including theatre, opera, classical music and fine arts.