Manhattan Building – Chicago, designed by William Le Baron Jenney, completed; world's earliest surviving steel-framed building to use a purely skeletal supporting structure.[3]
^"Uris Library Historical Tour: Introduction". Cornell University Library. Cornell University. Retrieved 30 October 2018.
^"Ludington Building, 1104 Wabash Campus 1104 S. Wabash Ave". Columbia College Chicago. 2006. Retrieved 2012-05-28.
^Manhattan Building, Chicago. Emporis Buildings (URL accessed 9 July 2006).Manhattan Building, 431 South Dearborn Street, Chicago, Cook County, IL. American Memory from the Library of Congress (URL accessed 9 July 2006).
^Pinkney, David H. (1972) [1958]. Napoleon III and the Rebuilding of Paris (Paperback ed.). Princeton, N.J.: Princeton University Press. ISBN 0-691-00768-3.
^Lanctot, Barbara (1988). A Walk Through Graceland Cemetery. Chicago Architectural Foundation. pp. 14–15.