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Key Tower
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Key Tower is a 57 story skyscraper on Public Square in downtown Cleveland, Ohio. Designed by architect César Pelli and completed in 1991, the 947-foot (289 m) building is the tallest in the state of Ohio, the 42nd-tallest in the United States, and the 165th-tallest in the world. Visible from up to 20 miles (32 km) away, the tower contains about 1.5 million square feet (139,355 m²) of office space.