|Country||United States of America|
|Year||1971 - 1974|
|Height||442.3 m / 1 451 ft|
|Surface||423 638 m² / 4 560 000 ft²|
Skidmore, Owings & Merrill (Bruce Graham)
Skidmore, Owings & Merrill (Fazlur Rahman Khan)
|Construction cost||175 million USD|
233 South Wacker Drive
Block bounded by Franklin Street and Wacker Drive, Adams Street and Jackson Boulevard
black anodized aluminum
- Tallest building in the world from 1974 until 1997.
- The antennae were added in 1982.
- Height including the antennae is 1730 feet (527 meters).
- 104 elevators.
- 74,000 tons of steel were used for the construction.