Bauhaus and its Sites in Weimar, Dessau and Bernau is a World Heritage Site in Germany, comprising six separate sites which are associated with the Bauhaus art school. It was designated in 1996 with four initial sites, and in 2017 two further sites were added. The Bauhaus was only in operation from 1919 until 1933 and it educated no more than 1,250 students, of whom only 155 actually graduated with a Bauhaus Diploma. Nevertheless, the school revolutionized 20th century architectural and aesthetic thinking and practice.