"Haus Sonnenfang" Sanatorium, Berlin, 1931: Ground floor plan

Black marker on paper

Black marker on paper

Colored marker on paper

Solvent on printed paper

Graphite on page of exhibition catalogue

Charcoal and graphite on paper

Colored marker and black pen on paper

Graphite on cream wove paper, squared

Colored crayons on paper

Black marker and blue pen on paper

Graphite on paper

Black crayon on paper