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

Charcoal on cream wove paper

Ink on paper

Graphite on gray laid paper

Watercolor on off-white wove paper

Black ink on cream wove paper

Tempera on heavy buff wove paper

Graphite on off-white wove paper

Crayon on paper

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

Graphite and brown ink on gray wove paper

Graphite on off-white wove paper, mounted to larger off-white wove paper

Watercolor over graphite on cream wove paper; verso: black ink and graphite