Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Sketch of elevation with penthouse

Black ink, graphite, and yellow chalk on cream wove paper

Black ink, charcoal, and watercolor on cream laid paper, edges taped

Graphite on off-white wove paper

Watercolor over graphite on heavy off-white wove paper

Watercolor and colored pencil on off-white wove paper

Black fiber-tip ink on thin cream wove paper mounted to white cardboard

Black crayon on paper

Gouache over graphite on buff paper mounted on composition board

Graphite on buff wove paper

Graphite on paper

Watercolor, black ink, and wax on blue wove paper, faded to white

Watercolor on off-white wove paper