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

Graphite and ink on paper

Black ink on paper

Graphite on paper

Ink and graphite on paper

Graphite and colored crayons on paper

Ink and wash on paper

Blue and black marker on paper and translucent film

Graphite and charcoal on paper

Black marker on paper

Colored marker on paper

Black marker on paper

Graphite on paper