Robert Irwin, American painter and gardener
Robert W. Irwin (born September 12, 1928) is an American installation artist who has explored perception and the conditional in art, often through site-specific, architectural interventions that alter the physical, sensory and temporal experience of space.

He began his career as a painter in the 1950s, but in the 1960s shifted to installation work, becoming a pioneer whose work helped to define the aesthetics and conceptual issues of the West Coast Light and Space movement. His early works often employed light and veils of scrim to transform gallery and museum spaces, but since 1975, he has also incorporated landscape projects into his practice. Irwin has conceived over fifty-five site-specific projects, at institutions including the Getty Center (1992–98), Dia:Beacon (1999–2003), and the Chinati Foundation in Marfa, Texas (2001–16). The Museum of Contemporary Art, Los Angeles mounted the first retrospective of his work in 1993; in 2008, the Museum of Contemporary Art San Diego presented another, spanning fifty years in his career. Irwin received a Guggenheim Fellowship in 1976, a MacArthur Fellowship in March, 1984, and was elected as a member of the American Academy of Arts and Letters in 2007. He lives and works in San Diego, California.