Around this scenography, the skin is all in faceted glass and plays on the distinctive shape of the Citroën logo: the chevron. At street level on the Champs-Elysées, the façade begins as a simple flat curtain wall. The double chevron soon appears proliferating as it rises in free and inventive array right up to the summit. The glass front unfolds a gigantic origami, coloured by diaphanous white and red film that lets subdued clear light into the interior.