Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Penthouse floor plan, 1:100

Turpentine wash with oil and oil crayon on cream laid paper

Black ink and graphite on off-white wove paper

Black crayon on off-white wove paper

Graphite on paper

Sketchbook with brown cloth-covered cardboard covers

Black ink on faded light-green wove paper

Black ink and gray wash on yellow laid paper

Gray-black ink on off-white wove paper, mounted on board

Gouache on brown wove paper

Watercolor on off-white wove paper

Graphite on heavy cream wove paper

Graphite on paper