Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Sketches

Charcoal on off-white laid paper

Graphite on paper

Black chalk, crayon and ink splatters on white wove paper

Black ink, charcoal, and and watercolor on cream laid paper

Graphite on paper

Colored crayons on paper

Pastel sketches on ruled paper

Watercolor on off-white wove paper

Graphite and red pencil on off-white wove paper

Crayon on paper

Black ink and purple fiber-tip ink on cream wove paper, darkened

Graphite on paper