The Cabinet of Dr. Caligari (1920) is a German silent horror film directed by Robert Wiene from a screenplay by Hans Janowitz and Carl Mayer. It is one of the most influential films of the German Expressionist movement and, according to Roger Ebert, is "the first true horror film". Dr. Caligari’s (Werner Krauss) somnambulist, Cesare (Conrad Veidt), and his deadly predictions. The film used stylized sets, with abstract, jagged buildings painted on canvas backdrops and flats. To add to this strange style, the actors used an unrealistic technique that exhibited "jerky" and dance-like movements. This film is cited as having introduced the twist ending in cinema.