One of the United States? most recognizable skyscrapers, the Willis Tower (formerly the Sears Tower), is set to receive a $500 million renovation designed by the Chicago office of Gensler. Announced by Chicago mayor Rahm Emanuel with real estate holders Blackstone and Equity Office, the project will transform and reinvigorate the 43-year-old building, which held the title of world?s tallest building for nearly a quarter century. 

Courtesy of Blackstone and Equity Office

One of the United States? most recognizable skyscrapers, the Willis Tower (formerly the Sears Tower), is set to receive a $500 million renovation designed by the Chicago office of Gensler. Announced by Chicago mayor Rahm Emanuel with real estate holders Blackstone and Equity Office, the project will transform and reinvigorate the 43-year-old building, which held the title of world?s tallest building for nearly a quarter century. 
Courtesy of Blackstone and Equity Office

?Willis Tower has always been iconic within Chicago?s skyline and around the world,? said Jon Gray, Global Head of Real Estate, Blackstone. ?Our goal is to restore Willis Tower to its original prominence and make it a must-visit destination in Chicago for tenants, local residents and tourists.?

Courtesy of Blackstone and Equity Office

At the center of the renovation plans is a new 3-story glass structure atop the existing stone ...