The document discusses four famous artists: 1) Leonardo da Vinci, a Renaissance polymath from Italy known for works like the Mona Lisa and The Last Supper. 2) Vincent van Gogh, a Postimpressionist painter from the Netherlands known for his expressive use of color and emotionally dark paintings. 3) Pablo Picasso, a pioneer of Cubism from Spain who painted in many styles including Cubism, Expressionism, and periods influenced by color. 4) Andy Warhol, an American pop artist known for works depicting popular culture in a detached style.