Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Staircase: section, 1:50

Watercolor and black ink on ivory wove paper

Charcoal on cream laid paper

Black ink on brown cardboard

Crayon on paper

Ink and graphite on paper

Graphite on paper

Graphite on off-white wove paper

Acrylic on off-white wove paper

Black ink on cream wove paper

Black ink and charcoal on cream laid paper

Watercolor on gampi paper

Black ink on tan wove paper