International Academy of Philosophy, Erlangen, 1924: Scheme B: section through lecture hall

Black marker on paper

Black marker on paper

Colored marker and black pen on paper

Graphite on paper

Black marker and opaque watercolor on paper

Paper

Graphite, colored pencil, and watercolor on paper

Graphite on paper

Graphite on paper

Black and blue crayon on paper

Colored marker on paper

Colored marker on paper