Sears (Willis) Tower, Chicago, Illinois, Site Plan

n.d.

Skidmore, Owings & Merrill (American, founded 1936) Bruce Graham (American, born Colombia, 1925–2010) Fazlur Khan (American, born Bangladesh, 1929–1982)

United States

Pen and black ink and zip-a-tone, with graphite, on reprographic print in black ink on cream wove paper