Biography
| 1941 | Born on 6 Dec.at Fort Wayne, IN, USA | |
| 1964 | B.S. University of Wisconsin, Madison, WI | |
| 1966 | M.F.A. Univ. of California, Davis, CA First solo exhibition in Los Angeles |
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| 1968 | Exhibition in New York Participated in Documenta in Kassel, Germany |
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| 1972 | Retrospective in Los Angeles, New York and Europe | |
| 1979 | Moved to New Mexico | |
| 1981 | Retrospective in West Germany and others | |
| 1986 | Retrospective in the Netherlands and others | |
| 1991 | Exhibition in England and others | |
| 1992 | Participated with video in Documenta at Kassel | |
| 1993 | Exhibition in Washington D.C. | |
| 1994-95 | A major retrospective at Museum of Modern Art in New York | |
| 1999 | Awarded Golden Lion Prize at Venice Biennale 12 Oct. 2004 to 28 Mar. 2005 Exhibition at Tate Modern |


