The towers created by Christian de Portzamparc are the fruit of his research into vertical volume and its sculptural dimension, which he has crystalized into his characteristic prismatic forms. From the city to the object, Christian de Portzamparc has worked on towers since his first projects in 1974, when he designed a water tower covered with vegetation, which became a poetic landmark for a new city in Marne-la-Vallée, France, followed in 1991 by the Lille Tower, a unique, sculptural object built over a railway station in Rem Koolhaas’s Euralille district (completed in 1995). His best known tower is the LVMH Tower in New York, USA, completed in 1999 (Business Week and Architectural Record award 2006), followed by the competition for the Hearst tower in 2000 and soon to be accompanied by the residential tower 400 Park Avenue in Manhattan, New York, USA, approved by the City Planning authorities in 2004 and for which the site demolition started in December 2011. Another tower, One57, is under construction in New York and slated for completion in 2013; an ultra-luxury hotel will occupy the first 20 floors of the thousand-feet high tower with 135 super-luxurious condominiums, many featuring breathtaking views over Central Park and the New York skyline. The 603-feet high headquarters of French bank Société Générale at La Défense district in Paris, the Granite Tower (completed in 2008) is the first sustainable high-rise building in France (H.E.Q. certified, the French equivalent of the North American LEED).