Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Staircase: section, 1:50

Graphite on off-white wove paper

Graphite on off-white wove paper

Colored crayons on paper

Charcoal on off-white laid paper

Goauche on off-white wove paper

Graphite on off-white laid paper

Brown marker on graph paper

Charcoal on off-white laid paper

Watercolor over graphite on off-white wove paper

Graphite and ink on paper

Ink on paper

Red, black and brown conté crayon on ivory tracing paper