Willis Tower
| Willis Tower | |
|---|---|
 | |
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 |
| Height | |
| 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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