la-defense

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I.M. Pei’s proposed 660’ project for the La Defense office district of Paris - (1971) Renderings By Helmut Jacoby.

Pei and partner Araldo Cossutta attempt to realize Ferris’s vision of a skyscraper bridging separated pedestrian and vehicular traffic with twin towers whose facades cascade into each other - turning the famous Arche De Triomphe which it lines up with along the Axe historique - on its head.
Eventually, this plan was discarded and a new project - that included a modern take on the monumental arch - with an accompanying pedestrian plaza was built in the 1980s.

http://en.wikipedia.org/wiki/Grande_Arche