"Haus Sonnenfang" Sanatorium, Berlin, 1931: Sketch of ground floor plan

Colored marker and black pen on paper

Graphite on paper

Paper

Black and colored crayons on off-white wove paper

Colored crayons on paper

Watercolor on paper

Graphite on off-white wove paper

Colored and metallic marker on paper

Graphite on paper

Black crayon on paper

Colored marker and black pen on paper

Black crayon on paper, mounted to paper