Friedrich Frobel House, Bad Liebenstein, 1924: Plan of roof level, 1:200

Black marker on paper

Colored marker and blue pen on paper

Black crayon on paper

Black crayon on paper

Graphite on paper

Black and colored crayon on off-white wove paper

Colored marker on paper

Ink on on blotter paper

Graphite on paper

Colored marker on paper

Colored marker on paper

Colored marker and graphite on paper