Draw a line on a map of Paris, from the Pyramid by I.M. Pei, and "Le Petit Arc du Carrousel" (in the gardens near the Louvre, Les Tuilleries) through the "Arc de Triomphe" to "La Grande Arche" by Von Spreckelsen and Andreu, in the northwest of Paris and you've got the "Grand Axe". The neighborhood at the end of the line, La Défense has mostly office buildings.
Rem Koolhaas presented a design proposal to revamp La Défense somewhere in Venice during the Biennial (see comment Piet Vollaard below)
Through November 23rd you can visit the Dutch submission to the 11th International Architecture Exhibition at the Venice Biennual, organized by the Netherlands Architecture Institute (NAi).