Homebase for the National Opera, the National Balletorchestra and the Dutch National Ballet. In september 1986 the 'Stopera' - combination of stadhuis (cityhouse) and Opera was opened by Queen Beatrix. Cees Dam was the architect who finished the project when the Austrian architect W. Holzbauer died. Inside the theatre there's a specially designed ceiling with lights designed by P. Struyken. Near the building you can visit the famous Waterlooplein flee market.