Ernst-Happel-Stadion, known as Praterstadion until 1992, sometimes also called Wiener-Stadion, is a football stadium in Leopoldstadt, the 2nd district of Austria's capital Vienna. With 50,865 seats, it is the largest stadium in Austria. It was built between 1929 and 1931 for the second Workers' Olympiad to the design of German architect Otto Ernst Schweizer. Wikipedia