Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Color symbols for different floors

Watercolor and graphite on cream wove paper

Graphite on buff card

Graphite and white gouache on gray-green wove paper

Black ink and charcoal on cream laid paper

Graphite on paper

Graphite on commercially lined yellow paper

Crayon on paper

Black ink, brown and gray watercolor on cream wove paper

Black, blue and green crayon on paper

Black chalk over red chalk on darkened off-white wove paper

Hammered marks on blue transfer paper

Black marker on graph paper