Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Sketch of detail

Graphite on paper

Watercolor on off-white laid paper

Charcoal on off-white laid paper

Watercolor over graphite on off-white wove paper

Graphite on off-white wove paper

Graphite on cream wove paper

Graphite and incised lines on white wove paper

Graphite on off-white tracing paper

Black ink on cream wove paper

Black ink and gray wash on cream laid paper

Graphite on off-white wove paper

Transparent and opaque watercolor and black crayon on off-white wove paper