Terminal 2E was designed by Paul Andreu with an elliptical skeleton, and inaugurated in 2003. This terminal partially collapsed in 2004, killing four people.
Here’s some practical information in French on how and when to get there. Click “Informations pratiques (suite)” in the menu for the second page.
Housed in the Maison La Roche (open to the public, along with Maison Jeanneret and Immeuble Molitor).