Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Main entrance: ground floor plan, elevation, sections, 1:20

Colored pencil and graphite on white wove paper

Black ink and watercolor pencil on white paper

Graphite on off-white wove paper

Black ink and graphite on thin buff wove paper

Black ink and graphite on ivory laid paper

Black ink and graphite on graph paper

Watercolor on off-white wove paper; verso: graphite

Watercolor and white gouache over graphite on heavy off-white wove paper

Black ink on off-white wove paper

Watercolor and red ink lines on white wove paper

Black ink on darkened off-white wove paper

Sketchbook with black-and-white marbled cardboard covers