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Skyline view of Chicago, Illinois, dominated by Willis Tower, long known as Sears Tower - digital file from original | Library of Congress
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Aerial view of skyline, with a focus on Willis Tower, long known as Sears Tower, Chicago, Illinois - digital file from original | Library of Congress
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Aerial view of skyline, Chicago, Illinois - PICRYL - Public Domain Media Search Engine Public Domain Search
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Aerial view of Chicago, Illinois, featuring Willis Tower, known as Sears Tower when this photo was taken in the 1990s Stock Photo - Alamy
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Toronto is close to edging out Chicago as North America's second city for skyscapers. Here's why. - Chicago Sun-Times
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Exploring Chicago's Architectural Legacy Through 5 Exceptional Projects | Skyline, Chicago skyline, Memorial weekend
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Aerial view of skyline, Chicago, Illinois - PICRYL - Public Domain Media Search Engine Public Domain Search
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