Willis Tower
Sears Tower ss.jpg

Willis Tower were the world's tallest buildings from 1974 to 1998.[I]
Record height
Preceded byWorld Trade Center
Surpassed byTaipie 101
General information
LocationChicago
StatusComplete
Constructed1970-1974
Height
Antenna or spire527 m (1,730 feet)
Roof442.1 m
Technical details
Floor count106 floors
Companies involved
Architect(s)Fazlur Khan
Structural engineerBruce Graham
OwnerWillis Insurance Company

^ Fully habitable, self-supported, from main entrance to highest structural or architectural top; see the list of tallest buildings in the world for other listings.



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