Bahner Residence, Berlin, Klein-Machnow, 1933: Drainage system: detail sketches

Mixed media

Graphite and transparent watercolor on cream wove paper

Graphite on paper

Colored marker on paper

Graphite on paper

Black marker on paper

Black, blue and pink crayon on paper and mounted

Black crayon on paper

Blue pen on paper

B/w photocopies, opaque watercolor, and adhesive on paper

Ink on paper

Blue ink on lined notebook paper