"Haus Sonnenfang" Sanatorium, Berlin, 1931: Ground floor plan, 1:500

Blue marker on paper

Graphite and watercolor on paper

Colored crayons on paper

Graphite on paper

Graphite on paper

Acrylic paint and graphite on particle board

Green and black crayon on paper

Colored marker and blue pen on paper

Ink on vellum

Black, blue and yellow crayon ; black crayon on paper

Watercolor on Japanese paper

Graphite and colored crayon on off-white wove paper