Hitler's belief that abstract, Dadaist, expressionist and modern art were decadent became the basis for policy. Many art museum directors lost their posts in 1933 and were replaced by party members. Some 6,500 modern works of art were removed from museums and replaced with works chosen by a Nazi jury. Exhibitions of the rejected pieces, under titles such as "Decadence in Art", were launched in sixteen different cities by 1935. The Degenerate Art Exhibition, organised by Goebbels, ran in Munich from July to November 1937. The exhibition proved wildly popular, attracting over two million visitors.