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

Graphite on off-white wove tracing paper

Black ink and graphite on off-white wove paper

Wax crayon over graphite on cream wove paper

Black ink on cream wove paper

Watercolor on off-white wove paper

Watercolor and gouache on cream wove paper

Graphite on paper

Black ink of off-white wove paper

Graphite on off-white wove paper

Black ink and gray wash on cream laid paper

Graphite and red pencil on tan wove paper; verso: graphite on tan wove paper

Graphite on off-white wove paper