"Haus Sonnenfang" Sanatorium, Berlin, 1931: North and south elevations

Blue and green crayon on paper

Black and colored crayons on off-white wove paper

Graphite and charcoal on off-white wove paper

Graphite on paper

Crayon on paper

Black, green, and yellow crayon on paper

Graphite on paper

Black and green crayon on paper

Colored marker, paper, and adhesive on paper

Graphite on paper

Colored crayons on paper

Graphite and charcoal on paper