1900 Born in Remscheid, Germany
1919 Attends an art school in Düsseldorf
1920 Meets progressive artists from Cologne: Adler, Seiwert, Hoerle etc.
1926 First political woodcuts for the periodical Die Proletarische Revolution
1928 Starts working for the 'Gesellschafts- und Wirtschafts-museum' in Vienna
1933 Leads the Moscow Institute for pictorial statistics
1934 Goes into exile in The Hague, in the Netherlands
1936 His woodcut 'The Third Reich' leads to a diplomatic incident with Germany
1943 Forced to enlist in the German Army
1946 Starts working again for the Dutch Foundation of Statistics
1976 Large retrospective exhibition in The Hague, the first of a series in museums in the Netherlands, Germany and Austria
1988 Dies in Rijswijk, near The Hague