Willis Tower, long known as Sears Tower, Chicago, Illinois | Library of Congress
Chicago Downtown City Lakefront with Willis-Sears Tower Photograph by Paul Velgos - Pixels
Skyline at dusk, dominated by Willis Tower, long known as Sears Tower, Chicago, Illinois - PICRYL - Public Domain Media Search Engine Public Domain Search
Buildings that elevated cities: Chicago's Sears Tower | Modus | RICS