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

Graphite on paper

Graphite on paper

Blue crayon on paper

Ink on paper

Black and red marker on paper

Paper

Mixed media

Graphite on paper

Black marker on paper

Graphite on off-white wove paper

Black crayon on paper

Graphite and blue crayon on paper