IITRI Test Cell (Formerly Armour Research Foundation), Chicago, IL (Elevations [north, west, south, and east], plan wings A, B, and C, and wiring diagram section.)
Ludwig Mies van der Rohe
American, born Germany. 1886–1969
Pencil, colored pencil (red) on ozalid
Mies van der Rohe Archive, gift of the architect