Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Door schedule, 1:50

Watercolor over graphite on off-white card, mounted to off-white cardboard

Black ink on machine made rag wove paper

Watercolor over graphite on off-white wove paper

Charcoal powder and fixative, torn paper collage

Graphite on off-white wove paper

Watercolor and graphite on thin off-white wove paper

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

Graphite on paper

Transparent and opaque watercolor over graphite on off-white wove paper mounted on cardboard

Red and brown conté crayon on cream wove paper

Graphite on paper

Black conté crayon on ivory tracing paper