Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Staircase: plan, sections, details, 1:20, 1:5

Unbound sketchbook

Watercolor on ruled off-white wove paper

Graphite on off-white wove paper

Charcoal on off-white laid paper

Graphite on off-white wove paper

Pastel and graphite on layered cream modern laid paper

Red crayon, red wash, and graphite on cream wove paper

Graphite and colored pencil on cream wove paper

Watercolor

Colored crayons on paper

Graphite on paper

Mixed media on paper