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

Black and blue ink on off-white wove paper

Watercolor, wax crayon and red pencil on orange wove paper

Graphite on heavy cream wove paper

Black ink, graphite, and colored chalk on cream wove paper

Graphite on off-white wove tracing paper

Graphite on cream colored paper

Black ink, blue-gray watercolor, brown wash, white gouache, collage, graphite, and touches of red chalk on cream wove paper

Watercolor, white gouache, gold paint, and black ink on off-white wove paper

Graphite on buff wove paper

Watercolor over graphite on cream wove paper

Graphite on paper

Pastel and graphite on white wove paper