The city boundaries were expanded between 1925 and 1930 to include an area of 175 km 2 (68 sq mi) with a population of 600,000. In 1929, the Werkbund opened WuWa ( German : Wohnungs- und Werkraumausstellung ) in Breslau-Scheitnig, an international showcase of modern architecture by architects of the Silesian branch of the Werkbund. In June 1930, Breslau hosted the Deutsche Kampfspiele , a sporting event for German athletes after Germany was excluded from the Olympic Games after World War I. The number of Jews remaining in Breslau fell from 23,240 in 1925 to 10,659 in 1933.  Up to the beginning of World War II, Breslau was the largest city in Germany east of Berlin.