"Haus Sonnenfang" Sanatorium, Berlin, 1931: South elevation, 1:500

Black and green marker on paper

Graphite and red crayon on paper

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Black marker on paper

Black crayon on paper

Graphite on cream wove paper, darkened

Graphite on paper

Graphite on white wove paper

Blue marker and black ink on paper

Black marker on paper

Colored marker on paper

Brown crayon on cream wove paper