Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: North elevation, 1:100

Watercolor and black chalk on off-white wove paper

Graphite on paper

Green marker on graph paper

Black ink on white wove paper

Black and blue ink, graphite, and casein paint on white wove paper

Graphite sketch on brown paper

Ink and brown pencil on white wove paper

Watercolor over graphite on white wove paper

Gouache

Graphite and crayon on paper

Watercolor over graphite with scratchwork on off-white wove paper

Graphite on off-white wove paper