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

Black crayon on paper

Black crayon on paper

Graphite on paper

Black ink, partly over graphite, on cream laid paper.

Graphite on paper

Graphite on tan wove paper

Black marker on paper

Graphite on paper

Colored crayons on paper

Graphite on paper

Black crayon on paper and mounted

Graphite on paper