Each of the Hotel Puerta América’s 12 floors - from the elevator lobbies down to the blankets and bathrobes - has been conceived by powerhouse architects and design studios, among them Arata Isozaki, Norman Foster, Marc Newson, Ron Arad, Richard Gluckman, Javier Mariscal, Victorio & Lucchino and Zaha Hadid. With public spaces like the Black Tears restaurant designed by Christian Liaigre and the underground garage by Teresa Sapey, the Puerta América can bill itself as “12 floors with 19 stars.”