Expressionism was originally a term used by early 20th century German artists to describe their aesthetic principles of presenting the world from a subjective perspective and distorting it for emotional effect rather than depicting physical reality. Key characteristics included extreme angles, flattened forms, garish colors, and distorted views. Two major German expressionist groups were Die Brücke, known for expressive landscapes, nudes and carnival scenes using strong colors and broad forms, and Der Blaue Reiter, ranging from pure abstraction to romantic imagery to express spiritual truths. Expressionist music also aimed to express emotion and featured atonal compositions with disjunct melodies, dissonance, and extreme dynamics.