"Haus Sonnenfang" Sanatorium, Berlin, 1931: Sketch of perspective

Black marker and adhesive on paper

Black crayon on paper

Black crayon on paper

Chalk heightened with acrylic on paper

Black ink and watercolor on cream laid paper

Black crayon or charcoal on paper

Colored marker, postcard cutouts, and adhesive on paper

Graphite on paper

Graphite on squared paper

Black crayon on paper

Colored marker on paper

Graphite on paper