Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: North entrance: plan, elevations, section, 1:20, 1:10

Gray tempera, black ink, graphite, and scratchwork on off-white wove paper; verso: black ink and graphite

Pastel over traces of charcoal on gray wove paper

Watercolor on white wove paper

Graphite on off-white wove paper

Opaque and transparent watercolor on white wove paper

Sketchbook with cardboard covers and spiral wire binding

Charcoal on off-white laid paper

Graphite and colored pencil on paper

Graphite on off-white wove paper

Black ink on cream wove paper; verso: brown crayon and graphite

Graphite on off-white wove paper

Graphite on paper