The Cabinet of Dr. Caligari is a 1920 German silent horror film directed by Robert Wiene and written by Hans Janowitz and Carl Mayer. The quintessential work of early German Expressionist cinema, it tells the story of an insane hypnotist who uses a brainwashed somnambulist to commit murders. The film features a dark, twisted visual style, with sharp-pointed forms; oblique, curving lines; structures and landscapes that lean and twist in unusual angles; and shadows and streaks of light painted directly onto the sets. The set design is "anti-realistic, claustrophobic" and "harsh" which is "coupled with feverish anxiety [that] entered the vocabulary of filmmakers and film viewers" particularly during the Weimar Republic, when this film was set.