While certain buildings have style and character the Monadnock located at 53 W Jackson has none and yet this building completed in 1891 is on the National Register of Historic Buildings.
The Monadnock building is the tallest (16 stories) load-bearing all brick building. The walls at the base of the building are over 6 ft thick and was one of the first modern skyscrapers in Chicago.
The lack of ornamentation on the building was done on purpose by two seperate architects. The Northern half was designed by Burnham and Root and the Southern half was designed by Holabird & Roche.