Sol LeWitt (1928 - 2007)

- Wall Drawing #260, The Museum of Modern Art, 2008. 

- Objectivity, Oil on canvas, 1962.

- Splotch #15, Acrylic on fiberglass, 2005.

- Wall Drawings, Crown Point Press, 657 Howard Street Entrance.

- Wall Installation, Whitney Museum of American Art, 2000. (NY Times article)

There are several great videos on Sol over at SF MOMA. And finally, John Baldessari sings So LeWitt, 1972.