Poelzig taught at the Breslau Art Academy (1900–16) and the Technical Academy in Berlin (1920–35). His Luban Chemical Factory, situated near Posen, and office building at Breslau (both 1911–12) contained novel elements, but nothing suggesting the imagination evident in his Grosses Schauspielhaus. This structure, a rebuilding of the Schumann Circus, has as its most notable feature an interior lined with stalactite shapes that, particularly under changing lighting conditions, create a grottolike atmosphere. Poelzig's later works, such as the administrative building of I.G. Farben in Frankfurt am Main (1930), although monumental in design, are held to be conventional.