Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Balconies: perspective sketch

Graphite on paper

Black ink, black crayon, and white gouache on off-white laid paper

Graphite on paper

Graphite on paper

Watercolor on off-white wove paper

Transparent and opaque watercolor on paper

Oil on tracing paper

Graphite on off-white wove paper

Graphite and colored pencil on artist's vellum (tracing paper)

Watercolor and white gouache over graphite on cream wove paper

Black and colored crayon on off-white wove paper

Charcoal on off-white laid paper