La Clef de L'horloge (Poème cinémathographique en l’honneur de Kurt Schwitters) (1958)
Broodthaers’s first film, Clef d’Horloge was made using a borrowed camera and some film stock that he had been given. It was shot at the Palais des Beaux-Arts, Brussels, in 1956, during an exhibition of works by Kurt Schwitters. The film is made in negative and positive and is based on several works