Mather Tower (formerly Lincoln Tower) 75 E. Wacker and the London Guarantee Building (left) c. 1928
Mather Tower is the narrowest skyscraper in Chicago with the smallest square footage per floor of any high-rise in the city. At its base it is 65x100 feet. The top floor of the octagonal tower is just 280 sq ft. The tallest building Chicago for a short period of time upon complete, the tower was originally intended to be one of 2 twin buildings, but plans changed when the stock market crashed in 1929. At one point in time, the building was in such bad condition that chunks of terracotta were falling off the building. In 2000 a new 4 story cupola was air-lifted by helicopter from a barge in the river and placed at the top of the building.