"Haus Sonnenfang" Sanatorium, Berlin, 1931: First-fourth floor plan, 1:500

Graphite on paper

Blue-green crayon on off-white wove paper

Graphite on paper

Graphite and crayon on paper

Colored marker on paper

Graphite on cream wove paper

Colored marker on paper

Graphite on tan wove paper

Graphite on paper

Black marker on paper

Graphite and red pencil on paper

Charcoal and black chalk with scratchwork on gray wove paper