Monadnock Block - View this location on map The two halves of this building provide a unique perspective for examining the history and development of modern architecture. The north part--famed for its lack of traditional ornamentation--is a masonry, wall-bearing structure, the last skyscraper to employ this method of construction, with six-foot thick walls at the base. The south addition, on the other hand, is an early example of steel-frame construction, its underlying structure revealed through narrow piers and wide windows. Together, they mark the end of one building tradition and the beginning of another. 53 W. Jackson Blvd., Chicago , IL Historical

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