Which is taller, the Aon Center (Chicago) or the Cologne Cathedral?
Answer : The Aon Center (Chicago) is taller than the Cologne Cathedral
The height of the Aon Center (Chicago) is 346 m, (1,135 ft) while the height of the Cologne Cathedral is 157 m, (515 ft)
| Name | Name:Aon Center (Chicago) | Name:Cologne Cathedral |
| Height | Height:346 m, (1,135 ft) | Height:157 m, (515 ft) |
| Location | Location:Chicago, United States | Location:Cologne, Germany |
| Year Constructed | Year Constructed:1973 | Year Constructed:1248–1880 |
| Description | Description: | Description:Tallest freestanding structure on land from 1880 to 1884 |
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