Surrealism was a cultural movement that began in the 1920s known for its visual artworks and writings that incorporated unconscious thoughts and dreams. There were two main types of Surrealists - automatic Surrealists who painted freely without thought to show the subconscious, and veristic Surrealists like René Magritte and Salvador Dalí who used familiar everyday objects painted realistically to convey hidden meanings or metaphors. Dalí and Magritte were two of the most famous Surrealist artists known for works like Persistence of Memory and The Son of Man that placed common items in unusual dreamlike situations.