Duke University Law School Addition, Durham, North Carolina, 1988-1995

[Conceptual Sketches of Cupola], untitled. Ink sketches with gray marker coloring on tracing paper, initialed, 19 1/4 x 18 inches [from photographic copy by Lance Burgharrdt]

Duke University Law School Addition, Durham, North Carolina, 1988-1995

[Conceptual Sketches of Cupola], untitled. Ink sketches with gray marker coloring on tracing paper, 15 3/4 x 18 inches [from photographic copy by Lance Burgharrdt]

Duke University Law School Addition, Durham, North Carolina, 1988-1995

[Conceptual Sketches of Cupola], untitled. Ink sketches with gray and green marker coloring on tracing paper, initialed, 17x12 inches [from photographic copy by Lance Burgharrdt]

Duke University Law School Addition, Durham, North Carolina, 1988-1995

[Conceptual Sketches of Cupola], untitled. Ink sketches with gray marker coloring on tracing paper, 14x12 inches [from photographic copy by Lance Burgharrdt]

Elmwood Housing, Detroit, Michigan, 1964 (unbuilt project)

[Conceptual Sketch], untitled. Purple crayon sketch on tracing paper, 12x25 inches [from photographic copy by Lance Burgharrdt]

Elmwood Housing, Detroit, Michigan, 1964 (unbuilt project)

[Conceptual Sketches],untitled. Blue ink sketches on yellow loose-leaf paper, 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]

Elmwood Housing, Detroit, Michigan, 1964 (unbuilt project)

[Conceptual Sketches], untitled. Blue ink sketches on yellow loose-leaf paper, 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]

Elmwood Housing, Detroit, Michigan, 1964 (unbuilt project)

[Conceptual Sketches], untitled. Black ink sketches on yellow loose-leaf paper, 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]

Lincoln Elementary School, Columbus, Indiana, 1965-1967

[Important Schematic Design Drawing], untitled. Pencil on vellum drawing, 17 1/2 x 28 inches [from photographic copy by Lance Burgharrdt]

Vocational Technical Institute Campus Master Plan, Carbondale, Illinois, 1967 (unbuilt project)

[Conceptual Sketches], untitled. Brown ink sketches on shirt cardboard, 8x12 inches [from photographic copy by Lance Burgharrdt]

Vocational Technical Institute Campus Master Plan, Carbondale, Illinois, 1967 (unbuilt project)

[Conceptual Sketches], untitled. Black and red ink sketches on tracing paper, 12 x 24 1/2 inches [from photographic copy by Lance Burgharrdt]

Vocational Technical Institute Campus Master Plan, Carbondale, Illinois, 1967 (unbuilt project)

[Conceptual Sketches], untitled. Black and red ink sketches on tracing paper, 12x17 inches [from photographic copy by Lance Burgharrdt]

Vocational Technical Institute Campus Master Plan, Carbondale, Illinois, 1967 (unbuilt project)

[Conceptual Sketch], untitled. Brown ink sketch on shirt cardboard, 8 x 8 3/4 inches [from photographic copy by Lance Burgharrdt]

Furniture, 1960s

[Perspective of Glass and Steel Table], untitled. Colored pencil drawing on tracing paper, 9 3/4 x 17 1/2 inches [from photographic copy by Lance Burgharrdt]

Oberlin College Conservatory of Music Library Addition, Oberlin, Ohio, 1986-1988

[Conceptual Sketches], untitled. Ink sketches on graph paper, 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]