Halle Civic Center, Museum, and Stadium, Halle, 1927-1928: Civic center, acoustical study: section, 1:200

Watercolor on paper

Black marker on paper

Black ink on tan wove paper

Graphite on paper

Charcoal and colored chalks on off-white wove paper; verso: graphite

Black ink on tan wove paper

Black and yellow crayon on paper and mounted

Graphite on paper

Colored marker on paper

Graphite on paper

Graphite and wash on paper

ink, watercolor, colored pencil, graphite, applied type, and typewritten text on paper, spatter-painted