founded by an association of eight former microstates (Saxe-Weimar-Eisenach, Saxe-Gotha, Saxe-Altenburg, Saxe-Meiningen, Schwarzburg-Rudolstadt, Schwarzburg-Sondershausen, Reuss-Gera and Reuss-Greiz) and Weimar became its capital. Due to that fact, the city experienced another period of growth. In 1919, Walter Gropius founded the Bauhaus School by a merger of the Weimar Saxon-Grand Ducal Art School with the Kunstgewerbeschule Weimar. The Bauhaus in Weimar lasted from 1919 to 1925, when it moved to Dessau, after the newly elected right-wing Thuringian council put pressure on the school by withdrawing funding and forcing its teachers to quit. Many buildings in Weimar today have influences from the Bauhaus period. 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. Nazi Germany and World War II Weimar was important to the Nazis for two reasons: first, it was where the hated Weimar Republic was founded, and second, it had been a centre of German high culture during recent centuries. In 1926, the NSDAP held its party convention in Weimar. Adolf Hitler visited Weimar more than forty times prior to 1933. In 1930, Wilhelm Frick became minister for internal affairs and education in Thuringia, the first NSDAP minister in Germany. In 1932, the NSDAP came to power in Thuringia under Fritz Sauckel. In 1933, the first Nazi concentration camps were established around Weimar in Nohra (the first one in Germany) and Bad Sulza. Most prisoners at this time were communists and social democrats. After Kristallnacht in 1938, harassment of Jews became more intense, so that many of them emigrated or were arrested. The Weimar Synagogue was destroyed in 1938. During the 1930s, the barracks in Weimar was greatly extended. One famous person serving as a soldier in Weimar was Wolfgang Borchert, later a well known poet and playwright. As it was the capital of Thuringia, the Nazis built a new Roman-fascist-style administrative centre between the city centre and the main station. This Gauforum, designed by Hermann Giesler, was the only Nazi governmental building completed outside Berlin (though there were plans for all German state capitals). Today it hosts the Thuringian State Administration.