Living Person
Willis_Tower
is
As of April 13, 2026
53 years old
approximately!
Date of Birth
(1973 ) is
Ox
Year
* Calculated from Wikipedia data.
Accuracy is not guaranteed.
approx.Cosmic Age Calculator
Moon
approx. 713.5 years old
Mercury
approx. 221.6 years old
Venus
approx. 86.7 years old
Mars
approx. 28.4 years old
Jupiter
approx. 4.5 years old
Saturn
approx. 1.8 years old
* Calculated based on each planet's orbital period.
| Willis Tower | |
|---|---|
 | |
 The Willis Tower as seen from the west in 2024 | |
 Interactive map of the Willis Tower area | |
| Former names | Sears Tower (1973–2009) |
| Record height | |
| Tallest in the world from 1973 to 1998 | |
| Preceded by | World Trade Center |
| Surpassed by | Petronas Towers |
| General information | |
| Status | Completed |
| Type | Office, observation, communication |
| Architectural style | International |
| Location | 233 S. Wacker Drive Chicago, Illinois 60606 United States |
| Coordinates | 41°52′44″N 87°38′09″W / 41.8789°N 87.6358°W |
| Current tenants | |
| Named for | Willis Towers Watson Sears (1973–2009) |
| Construction started | 1970 |
| Completed | 1974 |
| Opening | September 1973 |
| Cost | US$150 million |
| Owner | Blackstone Group |
| Height | |
| Architectural | 1,451 ft (442 m) |
| Tip | 1,707 ft (520.3 m) after antennas added in 1982, 1,729 ft (527.0 m) after antenna extension in 2000 |
| Top floor | 1,354 ft (413 m) |
| Technical details | |
| Floor count | 110 (+3 basement floors) |
| Floor area | 4,477,800 sq ft (416,000 m) |
| Lifts/elevators | 104, with 16 double-decker elevators, made by Westinghouse, modernized by Schindler Group and recently modernized by Otis Elevator Company |
| Design and construction | |
| Architects | Skidmore, Owings & Merrill Fazlur Rahman Khan Bruce Graham |
| Engineer | Jaros, Baum & Bolles (MEP), Aon Fire Protection Engineering, formerly Schirmer Engineering Corporation (Fire) |
| Structural engineer | Skidmore, Owings & Merrill |
| Main contractor | Morse Diesel International |
| Website | |
| willistower.com | |
| References | |
| I. ^ "Willis Tower". Emporis. Archived from the original on September 23, 2015. | |
Look up "Willis_Tower" on WikipediaWikipedia Categories
- CS1: unfit URL
- Central Chicago
- United Airlines
- Peruvian inventions
- Fazlur Khan buildings
- Sears (department store)
- Tourist attractions in Chicago
- 1973 establishments in Illinois
- Former world's tallest buildings
- Office buildings completed in 1973
- Skidmore, Owings & Merrill buildings
- Skyscraper office buildings in Chicago
- Use American English from October 2023
- Tourist attractions along U.S. Route 66
- Buildings and structures on U.S. Route 66
- Retail company headquarters in the United States
- Airline company headquarters in the United States
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