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

Ink on paper

Crayon on paper

Graphite and charcoal on off-white wove paper

Watercolor over graphite on off-white wove paper

Graphite on off-white wove paper

Black ink on cream wove paper

Red watercolor on white wove paper

Watercolor and white gouache on cardboard

Charcoal on cream wove paper

Graphite on cream wove paper

Pastel over traces of charcoal on gray wove paper

Ink on paper