"Haus Sonnenfang" Sanatorium, Berlin, 1931: Fourth floor plan, 1:500

Oil on wove paper

Black crayon on paper

Colored marker and graphite on paper

Colored marker on paper

Black marker on paper

Colored marker on paper

Graphite with blue and yellow crayon on paper

Black and colored crayons on tan laid paper

Graphite on cream wove paper

Black crayon on paper

Graphite on paper

Ink and colored crayons on paper