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

Brown cardboard sketchbook with drawings in black ink on off-white wove paper

Graphite on paper

Graphite on paper

graphtie and red colored pencil on cream colored paper

Black ink on thin off-white wove paper

Colored crayons on paper

Black ink on off-white wove paper

Ink and graphite on paper

Watercolor and black ink on darkened off-white wove paper

Black ink on off-white wove paper

Black ink over graphite on cream laid paper

Pen and ink on paper