Originally a literary movement, Surrealism explored dreams, the unconscious mind, and illogical or irrational juxtapositions to portray multiple levels of reality. Inspired by Freudian psychoanalysis and the chaos of WWI, it used techniques like impossible scales, reversal of natural laws, and dreamlike double images. Major Surrealist artists included Salvador Dali, Rene Magritte, and Joan Miro, working primarily in France and Spain in the 1920s-1930s. Dali's Persistence of Memory and Magritte's Ceci n'est pas une pipe are famous examples that employed Surrealist techniques to challenge conventional perceptions of reality.