Vienna is the capital of Austria, and also one of the nine States of Austria. Vienna is Austria's primate city; with a population of about 1.6 million (2.2 million within the metro area), Vienna is by far the largest city in Austria as well as its cultural, economic and political centre. Vienna lies in the south-eastern corner of Central Europe and is close to the Czech Republic, Slovakia and Hungary. In 2001, the city centre was designated a UNESCO World Heritage Site.
Founded around 500 BC, Vienna was originally a Celtic settlement. In 15 BC, Vienna became a Roman frontier city guarding the Roman Empire against Germanic tribes to the north. Art and culture have a long tradition in Vienna, in the areas of theatre, opera, classical music and fine arts. Apart from the Burgtheater which, together with its branch, the Akademietheater, is considered one of the best theatres in the German-speaking world.