Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Main entrance: ground floor plan, elevation, sections, 1:20

Watercolor over graphite on off-white wove card

Watercolor on ruled off-white wove paper

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

Black chalk and charcoal on off-white laid paper

Graphite on paper

Crayon on paper

Black ink and charcoal on off-white wove paper; verso: black ink

Black ink on off-white tracing paper

Gouache and blue crayon on dark cream wove paper, darkened

Black ink over graphite on off-white illustration board

Watercolor and white gouache on off-white wove paper

Acrylic, graphite, and computer print-out on off-white wove paper