Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Sketches of details

Graphite on off-white wove paper

Charcoal on cream laid paper

Black ink and gray wash on cream laid paper

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

Graphite on white wove paper

Graphite on thin off-white wove paper

Graphite and watercolor on white paper

Watercolor and gouache on off-white illustration board

Graphite on paper

Blue ballpoint pen and watercolor and gouache on paper

Watercolor and graphite on heavy off-white wove paper

Ink on paper