Bahner Residence, Berlin, Klein-Machnow, 1933: Exterior stairway and glass wall: plan, elevation, sections, and details, 1:1, 1:10, 1:20

Colored marker and black pen on paper

Black and red marker and black pen on paper

Black crayon on paper

Graphite and traces of brown pencil on cream wove paper

Blue crayon on paper

Colored marker on paper

Graphite on paper

Black ink on translucent vellum paper

Graphite and colored crayon on paper

Black marker and ink, and opaque watercolor on paper

Watercolor on Japanese paper

Black crayon on paper