is the capital city of Austria and at the same time one of the nine states of Austria. Vienna has also formerly been known as the capital of the Holy Roman Empire, of the Austria Empire and as one of the Austro-Hungarian Empire. The Schönbrunn Palace was recognized by UNESCO as a World Heritage Site and the St. Stephan´s Cathedral and the Ferris Wheel at the entrance of the amusement park in Leopoldstadt (2nd district of Vienna) are the landmarks of this city.