Paris Ultra-Luxury — The Finest Five-Star Stays

Paris's summit is the palace-designated hotel, a French distinction reserved for a handful of addresses, and within them the signature suites that occupy entire floors, some with rooftop terraces looking across the zinc rooftops to the Eiffel Tower and Sacré-Cœur. Expect butlers, private dining rooms and in-suite spa treatments, plus concierges who can open couture salons and arrange private museum viewings. The finest suites in the 1st and 8th arrondissements are effectively private apartments and are reserved well in advance.