Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Roof and gutter details, 1:10

Charcoal on cream wove paper

Black ink and gray wash on cream laid paper

Charcoal on off-white laid paper

Black ink, watercolor, and charcoal on cream wove paper

Graphite on heavy off-white wove paper

Watercolor on off-white wove paper

Charcoal on off-white laid paper

Acrylic and graphite on white wove paper

Graphite on buff wove paper

Charcoal, oil stick, acrylic, and Liquid Paper on white wove paper

Graphite on white paper

Black ink and watercolor pencil on white wove paper