"Haus Sonnenfang" Sanatorium, Berlin, 1931: Roof plan, 1:500

Graphite on paper

Graphite on paper

Charcoal on paper

Black and red inks and applied type on paper

Black and colored crayons on paper

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Dried leaf, adhesive, and blue pen on paper

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Graphite on paper

Colored crayon on paper

Crayon on paper