Willis Tower

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Willis Tower
Sears Tower ss.jpg

Willis Tower were the world's tallest buildings from 1974 to 1998.[I]
Record height
Preceded by World Trade Center
Surpassed by Taipie 101
General information
Location Chicago
Status Complete
Constructed 1970-1974
Antenna or spire 527 m (1,730 feet)
Roof 442.1 m
Technical details
Floor count 106 floors
Companies involved
Architect(s) Fazlur Khan
Structural engineer Bruce Graham
Owner Willis 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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