Studies from Gropius' Berlin Office: Water, gas, and electric installations

Graphite on paper

Black crayon on paper

Black crayon on paper

Black and colored crayons on paper

Ink with yellow, blue, and purple crayon on paper

Tusche on tan wove paper

Spruce green crayon on paper

Colored marker and red ink on paper

Black marker on paper

Graphite and ink on paper

Black crayon on paper

Graphite on paper