Hans Poelzig (1869-1936) was a pioneer of Expressionism, an architect who created some of the most extraordinary and fantastic buildings of the early twentieth century including the fantasy landscape of the Grosse Schauspielhaus in Berlin and an ominous-looking chemical works in Luban (now Poznan, Poland). His work became more severe and functional through the inter-war period. The vast, stripped-down IG Farben building (1930-31) in Frankfurt exemplifies this shift and also proved to be his last great building. The simple lever he designed for it in 1930 displays a more human, less mechanical version of Modernism than the self-consciously functionalist and geometric designs of many of his contemporaries.