Architectural Designs

Which are the Famous buildings which use Pi in the architectural design?

I'm doing this project on Pi and i need to know which buildings require the usage of pi in its architectural design. Help me please

Public Comments

1. The Rogers Centre (formerly SkyDome) in Toronto has a round retractable roof. The Capitol Records Building is circular. Here are some more: http://commons.wikimedia.org/wiki/Category:Round_buildings
2. Any circular or domed building such as the Capitol building in Washington, the Superdome in New Oleans, etc. I don't know of any truly circular buildings, many the Leaning Tower of Pisa.