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

Black crayon on beige wove paper

Ink and applied type on paper

Black crayon on paper

Black crayon or charcoal on paper

Graphite on paper

Graphite on paper

Charcoal and black chalk on off-white modern laid paper

Colored marker on paper

Graphite on paper

Paper

Colored marker on paper

Black marker on paper