Factory and Office Building for Werkbund Exhibition, Cologne, 1914: Perspective

Black ink and graphite on off-white wove paper

Black crayon on paper

Black crayon on paper

Ink and watercolor on paper

Black crayon on paper

Colored marker and black pen on paper

Tusche and graphite on paper

Graphite on paper

Colored crayons on paper

Graphite on paper

Black crayon on paper

Watercolor on brown wove paper