Juma al-Majid Center for Culture and Heritage Competition, Dubai, United Arab Emirates, 1993 (unbuilt project)

[Conceptual Sketch], untitled. Ink sketch with marker coloring on tracing paper, initialed, 18 3/4 x 18 inches [from photographic copy by Lance Burgharrdt]

Library of Michigan, Martha Griffiths Rare Book Room, Lansing, Michigan, 1993 (unbuilt project)

[Conceptual Sketch], untitled. Ink sketch on tracing paper, 12 x 17 3/4 inches [from photographic copy by Lance Burgharrdt]

Library of Michigan, Martha Griffiths Rare Book Room, Lansing, Michigan, 1993 (unbuilt project)

[Conceptual Sketch], untitled. Ink sketch with brown marker coloring on tracing paper, 18 x 21 1/4 inches [from photographic copy by Lance Burgharrdt]

Pompeo Leoni Private Residential Project, Milan, Italy, 1992-1994 (unbuilt project)

[Conceptual Sketch of Elevation], untitled. Ink sketch with pencil coloring on tracing paper, initialed, 14 3/4 x 18 inches [from photographic copy by Lance Burgharrdt]

Pompeo Leoni Private Residential Project, Milan, Italy, 1992-1994 (unbuilt project)

[Conceptual Sketch of Roof Development], untitled. Green ink sketch on electrostatic print, initialed, 30x42 inches [from photographic copy by Lance Burgharrdt]

Freeman Residence, Grand Rapids, Michigan, 1964-1966

[Conceptual Sketch], untitled. Red crayon drawing on tracing paper, 12x18 inches

Freeman Residence, Grand Rapids, Michigan, 1964-1966

[Conceptual Sketch], untitled. Red crayon drawing on tracing paper, 19 1/2 x 23 3/4 inches

Tougaloo College Master Plan, Tougaloo, Mississippi 1965-1971 (unbuilt project)

[Conceptual Sketches], untitled. Digital image only of black ink sketches on vellum and tracing paper

Tougaloo College Master Plan, Tougaloo, Mississippi 1965-1971 (unbuilt project)

[Conceptual Sketches], untitled. Digital image only of black ink sketches on shirt cardboard

Tougaloo College Master Plan, Tougaloo, Mississippi 1965-1971 (unbuilt project)

[Conceptual Sketches], untitled. Digital image only of blue ink sketches on vellum

Contemporary Arts Museum, Houston, Texas 1970-1972

[Conceptual Sketches], untitled. Black and red ink sketches on tracing paper, 12 x 16 1/2 inches

State University of New York, Purchase College Dance Instructional Facility, Purchase, New York, 1970-1976

[Conceptual Sketches #17], untitled. Black ink sketches on shirt cardboard, 8 x 10 3/4 inches

State University of New York, Purchase College Dance Instructional Facility, Purchase, New York, 1970-1976

[Conceptual Sketches #18], untitled. Black ink sketches on shirt cardboard, 8x14 inches

Subterranean Urban Systems Study, Graham Foundation Grant 1971-1974

[Conceptual Sketches], untitled. Digital image only of blue ink sketches on spiral notebook paper, initialed, 8 1/4 x 10 3/4 inches

University of Michigan Sports Services Building, Ann Arbor, Michigan, 1985-1990

[Early Roof Studies], untitled. Black and blue ink sketches on two sheets of tracing paper with blue and orange marker coloring, 18x28 inches. Second sketch is digital image only