Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Color symbols for different floors

Watercolor and white gouache over graphite on cream laid paper

Graphite on paper

Graphite and wax crayon on glossy wove paper

Gouache and black and gray wash on off-white wove paper; verso: graphite

Oil on white primed paper

Watercolor and black ink over graphite on off-white wove paper

Black ink on off-white wove paper

Black ink on white wove paper

Black ink over graphite on off-white wove paper

Crayon on paper

Black colored pencil on tan wove paper; verso: black ink

Crayon on paper