File Name: judd_bochner.jpg
Donald Judd's "Untitled" (1963) in front of Mel Bochner's "Theory of
Boundaries"
(1969-1970) in the post World War II collection galleries,
East Building, National Gallery of Art, Washington.
© 2007 Board of Trustees, National Gallery of Art, Washington. Photo
by Rob Shelley

File Name: 2004_123_1.jpg
Mel Bochner
Theory of Boundaries, 1969-1970
chalk on dry pigment on wall
National Gallery of Art, Washington
The Nancy Lee and Perry Bass Fund
Photo by Lee Ewing, © 2007, National Gallery of Art, Washington

File Name: B-06-97-220_F.jpg
Artist Mel Bochner creates Theory of Boundaries at the National Gallery of Art, Washington, February 14–16, 2007.
Photo by Lee Ewing, © 2007, National Gallery of Art, Washington

File Name: B-06-97-310_F.jpg
Artist Mel Bochner and assistant Nicholas Knight create the fourth panel of Theory of Boundaries at the National Gallery of Art, Washington, February 14–16, 2007.
Photo by Lee Ewing, © 2007, National Gallery of Art, Washington

File Name: B-06-97-339_F.jpg
Artist Mel Bochner uses stencils to perfect lettering in Theory of Boundaries at the National Gallery of Art, Washington, February 14–16, 2007.
Photo by Lee Ewing, © 2007, National Gallery of Art, Washington

File Name: B-06-97-350_F.jpg
Artist Mel Bochner and assistant Nicholas Knight create the fourth panel of Theory of Boundaries at the National Gallery of Art, Washington, February 14–16, 2007.
Photo by Lee Ewing, © 2007, National Gallery of Art, Washington

File Name: B-06-97-416_F..jpg
Artist Mel Bochner hand-letters the fourth panel of Theory of Boundaries at the National Gallery of Art, Washington, February 14–16, 2007.
Photo by Lee Ewing, © 2007, National Gallery of Art, Washington

File Name: B-06-97-437_F.jpg
Artist Mel Bochner uses stencils to perfect lettering in Theory of Boundaries at the National Gallery of Art, Washington, February 14–16, 2007.
Photo by Lee Ewing, © 2007, National Gallery of Art, Washington

File Name: B-06-97-462_F.jpg
Artist Mel Bochner hand-letters the fourth panel of Theory of Boundaries at the National Gallery of Art, Washington, February 14–16, 2007.
Photo by Lee Ewing, © 2007, National Gallery of Art, Washington