"Haus Sonnenfang" Sanatorium, Berlin, 1931: Roof plan, 1:500

Brown and black crayons on paper

Colored crayons on paper and mounted

Graphite on paper

Graphite on paper

Gouache, black ink, watercolor, and graphite on cream wove paper

Graphite on paper

Graphite and colored crayons on paper

Graphite on tan wove paper

Blue crayon on paper

Colored marker on paper

Black crayon on paper

Light purple marker on paper