Tapers outward in two stages, making it 20 feet wider at the top than at the bottom.
Tallest building on the west side of Chicago.
The tallest building designed by S.O.M. partner Walter Netsch, a major modernist architect responsible for the "Field Theory" and famous structures such as the Northwestern University Library.
Originally connected by concrete elevated walkways to other buildings on the campus. The openings for the walkways can still be seen on the 2nd floor.