Robert Smithson | |
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| Born | Robert Irving Smithson January 2, 1938 Passaic, New Jersey, U.S. |
| Died | July 20, 1973 (aged 35) Near Amarillo, Texas |
| Education | Art Students League of New York |
| Known for | Sculpture, Earthworks |
| Notable work | Spiral Jetty, 1970 |
| Movement | Land art |
| Spouse | Nancy Holt |
| Patron(s) | Virginia Dwan |
Robert Smithson (January 2, 1938 – July 20, 1973) was an American artist known for sculpture and land art who often used drawing and photography in relation to the spatial arts. His work has been internationally exhibited in galleries and museums and is held in public collections. He was one of the founders of the land art movement whose best known work is the Spiral Jetty (1970).