As an art student in Madrid and Barcelona, Dalí assimilated a vast number of artistic styles and displayed unusual technical facility as a painter. It was not until the late 1920s, however, that two events brought about the development of his mature artistic style: his discovery of Sigmund Freud's writings on the erotic significance of subconscious (unconscious) imagery, and his affiliation with the Paris Surrealists, a group of artists and writers who sought to establish the “greater reality” of man's subconscious over his reason. To bring up images from his subconscious mind, Dalí began to induce hallucinatory states in himself by a process he described as “paranoiac critical.”

Once Dalí hit on this method, his painting style matured with extraordinary rapidity, and from 1929 to 1937 he produced the paintings which made him the world's best-known Surrealist artist. He depicted a dream world in which commonplace objects are juxtaposed, deformed, or otherwise metamorphosed in a bizarre and irrational fashion. Dalí portrayed these objects in meticulous, almost painfully realistic detail and usually placed them within bleak, sunlit landscapes that were reminiscent of his Catalonian homeland. Perhaps the most famous of these enigmatic images is “The Persistence of Memory” (1931), in which limp, melting watches rest in an eerily calm landscape. With the Spanish director Luis Buñuel, Dalí also made two Surrealistic films—Un Chien andalou (1928; An Andalusian Dog) and L'Âge d'or (1930; The Golden Age)—that are similarly filled with grotesque but highly suggestive images.