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

Graphite on paper

Colored marker on paper

Graphite on paper

Graphite on paper

Graphite and applied typescript on paper

Black marker on paper

Black marker on paper

Paper

Paper beneath inserted photocopies

Graphite and blue pen on paper

Blue crayon on paper

Black and red marker, paper, and adhesive on paper