Architectural | Skyscraper |
Architect | Skidmore, Owings & Merrill |
Architectural Height | 1,450 ft (442 m) |
Total Floor | 110, with 16Lifts |
Floor area | 4,477,800 sq ft (416,000 m sq) |
Address | 233 S Wacker Drive, Chicago, IL 60606, United States |
Country | United States |
Construction started | 1970 |
Completed | 1973 |
Opened | June 22, 1974 |
Cost | USD $150 million |
Owner | Blackstone Group |
Social Media | |
Website | willistower.com |
Willis Tower is 110 Story skyscraper in the United States at 233 S Wacker Drive, Chicago. It is designed by Skidmore, Owings, and Merrill and their team of Colombian- Peruvian architect Bruce Graham and structural engineer Fazlur Rahman Khan. The construction started in 1970 and was completed in 1973. Willis Tower construction cost was USD $150 Million. It opened for people on June 22, 1974. Currently, it is owned by Blackstone Group.

Ranking
Tallest Building | Rank |
World | 12th |
United States | 3rd |
More Facts about Willis Tower
- Its previous name was Sears Tower but on July 16, 2009, the building was officially renamed as Willis Tower.
- 2,000 construction workers took part in building Willis Tower.
- It has been the tallest building in the world from 1973 to 1998.
- Willis Tower is the 12th tallest building in the world and it is the second tallest building in North America.
- Willis Tower was purchased by Blackstone in 2015 for $1.3 billion.
- Wills tower has an observation deck, called the sky deck. It becomes a tourist attraction from June 22, 1974.
- Each year more than one million people visit the sky deck.
- Willis Tower has approximately 16,100 bronze-tinted windows and 76,000 tons of steel.
- The design of this building was inspired by an advertisement for a package of cigarettes.
- There are many broadcast station transmitters which are located at the top of the tower.
- The building has been shown in a number of movies and television shows which are set in Chicago.

Skydeck
- Skydeck opened in 1974 and attracts more than 1.7 million visitors annually and it is the highest observation deck in the United States.
- The Ledge is made of three layers of half-inch thick glass laminated into one seamless unit.
- The ledge is 1,353 feet and 103 stories up.