Railway Exchange Building, 1904, D.H. Burnham & Co., 224 S. Michigan Ave. Photo Credit: Eric Allix Rogers

Railway Exchange Building, 1904, D.H. Burnham & Co., 224 S. Michigan Ave. Photo Credit: Eric Allix Rogers

Carbide and Carbon Building, 1929, Burnham Brothers, 230 N. Michigan Ave. Photo Credit: Eric Allix Rogers
Chicago Board of Trade Building, 1930, Holabird & Root 141 W. Jackson Blvd. Photo Credit: Eric Allix Rogers