CHICAGO - Bruce Graham, the pioneering architect who designed the iconic Chicago skyscraper formerly named the Sears Tower, has died. He was 84.
Chicago-based public relations firm SCC Grossman said Graham died Saturday at his home in Hobe Sound, Fla. The firm said Monday that Graham died of complications from Alzheimer's disease.
The 110-story Sears Tower was renamed the Willis Tower last year. The skyscraper opened in 1974 and was the world's tallest until the Petronas Twin Towers opened in Kuala Lumpur, Malaysia, in 1996. The Chicago tower remains the tallest in the United States. The black, X-marked structure on Michigan Avenue was completed in 1970.- AP