Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Penthouse: plan, sections, 1:50

Charcoal on off-white laid paper

Graphite on off-white wove paper

Black, brown, blue and purple crayon on paper

Black crayon and graphite on off-white wove paper

Graphite on off-white wove paper

Charcoal on blue laid paper

Acrylic, graphite, and computer print-out on off-white wove paper (12 drawings)

Transparent and opaque watercolor and graphite on white wove paper

Black ink on off-white wove paper

Crayon on paper

Black crayon on paper

Watercolor and white gouache over graphite and blue crayon on buff laid paper