|Year||1971 - 1974|
|Height||442,3m / 1 451ft|
|Surface||408.773m2 / 4,400,000sq ft|
|Architect||Skidmore, Owings & Merrill (Bruce Graham)|
|Engineers||Skidmore, Owings & Merrill (Fazlur Rahman Khan)|
|Developer||Sears, Roebuck and Company|
black anodized aluminum
233 South Wacker Drive - Block bounded by Francklin Street and Wacker Drive, Adams Street and Jackson Boulevard
Tallest building in the world from 1974 until 1997.
74000 tons of steel were used for the construction.