A landmark building in Saint-Denis, the Tour Pleyel has long been a testament to the difficulties encountered by office real estate north of the capital. Now transformed into a 4-star hotel and accompanied by new office buildings, it is now part of the Business Resort Paris Pleyel, set to lead the charge in the area's economic renewal. We interview Boris Litty, Managing Director of Financière des Quatre Rives, Mathieu Hanotin, Mayor of Saint-Denis and Chairman of the Plaine Commune public authority, and Sretchko Markovic, architect and founder of the 163 Ateliers agency.