![]() | 5 - Willis Tower (formerly Sears Tower), Chicago, United States of America. When completed in 1973, the Sears Tower was the tallest building in the world. If the spires of thebuilding are included, the building stands at 527 meters (1,730 feet) tall. Sears’ rights to the name of the building expired in 2003, although the building retained its name for several years. In 2009, Willis Group Holdings bought a portion of the building and took over its official name. Willis Tower remains the tallest building in the United States. |
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