Cadillac today unveiled the Ciel concept, an elegant, open-air grand-touring car inspired by the natural beauty of the California coast. The Ciel -- pronounced "C-L," the French translation for sky -- is a four-seat convertible that opens a new chapter in Cadillac's design and product ascent, pushing the brand's Art & Science philosophy into a new stratum. Ciel is a new expression of Cadillac's historical grandeur, as well as a celebration of open-air motoring.