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

Graphite and charcoal on paper

Graphite on cream wove paper

Graphite on paper

Graphite on gray-green wove paper

Ink on paper

Watercolor and white gouache on blue laid paper

Graphite on paper

Charcoal on off-white laid paper

Watercolor and white gouache over graphite on heavy off-white wove paper

Black ink and colored chalk on translucent buff wove paper

Graphite on off-white wove paper

Watercolor over graphite on white wove watercolor paper