How many movies have Christoph Schlingensief and Udo Kier collaborated on?

They have worked on 7 movies together! Their first movie together was Egomania: Island Without Hope (1987) while their highest rated movie together was 100 Years of Adolf Hitler – The Last Hour in the Führerbunker (1989). They have not worked together since The 120 Days of Bottrop (1997). They are most known for their comedy films together.