8. Aon Heart
Chicago’s third tallest constructing opened its doorways in 1973. Again then it was named the Customary Oil Constructing and was fairly the spectacle. The development crew went all out, adorning the complete exterior with Italian Carrara marble.
Nevertheless, due to how skinny the fabric was, all it took was one slab to detach in 1974 and crash onto the close by Prudential Centre. An investigation quickly decided that the marble was unsafe to be used. A nice instance of self-importance taking precedent over architectural practicality!
