How the Willis Tower Began its Renovation
Updating Chicago’s tallest building, the Willis Tower, was a tall order. The $500 million renovation of the 110-story edifice took five years, and included a 300,000-square-foot, five-level addition on its southern side, filled with stores, eateries, and a landscaped terrace on the rooftop. The existing 4.5-million-square-foot high skyscraper underwent a transformation as well, adding cafes,…
