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

Black crayon on paper

Graphite on cream wove paper

Colored crayons on paper

Black crayon on back of letter

Colored crayons on paper

Colored marker on paper

Aqua, black and red crayon on paper

Graphite on paper

Blue marker and black ink on paper

Colored marker on paper

Colored marker and black pen on paper

Colored marker on paper