High Quality Content by WIKIPEDIA articles! The One Liberty Place Building is currently the second tallest building and skyscraper in the City of Philadelphia and the Commonwealth of Pennsylvania, after the Comcast Center. It is the 17th tallest building in the United States. Completed in 1987, One Liberty Place has 61 floors and is 945 ft (288 m) tall, only two feet (0.6 m) shorter than the Key Tower in Cleveland, Ohio. Designed by Helmut Jahn of Murphy/Jahn Architects, the building's spire echoes that of the Chrysler Building in New York City.