"Haus Sonnenfang" Sanatorium, Berlin, 1931: Sketches of perspectives and plan

Black, blue, and yellow crayons on paper and mounted

Graphite on paper

Colored crayon on paper

Graphite on paper

Graphite on paper

Blue marker on paper

Graphite on paper

Colored and metallic marker on paper

Colored and metallic marker on paper, adhesive, and colored marker on paper

Black crayon on paper

Colored marker and black pen on paper

Graphite on paper