 However, only one original Bauhaus building was constructed during 1919–1925, the Haus am Horn, now used for exhibitions and events on Bauhaus culture.The Weimar Republic era was marked by a constant conflict between "progressive" and national socialist forces, the former represented by Harry Graf Kessler and the latter Adolf Bartels in Weimar.After 1929, the right wing forces prevailed and Weimar became an early centre of Nazism.