"Haus Sonnenfang" Sanatorium, Berlin, 1931: Sketches of perspectives and ground floor plan

Paper

Colored marker on paper

Black and blue crayon on paper

Black marker on paper

Black crayon on paper

Red marker, blue ink, paper, and adhesive on paper

Colored marker on paper

Black crayon on paper

Graphite on scored card, annotations in brown ink

Green crayon on paper

Graphite on paper

Graphite on paper