The Cabinet of Dr. Caligari is a 1920 silent horror film directed by Robert Wiene, considered a landmark in early cinema and a pivotal work of German Expressionism. Its visually striking style, characterized by distorted sets, painted shadows, and angular forms, conveys themes of madness and authority, reflecting the psychological state of post-World War I Germany. This film not only set a precedent for the horror genre but also influenced various European cinema movements with its innovative use of visuals and narrative structure.