Following a two-year restoration, Prince de Galles, a Luxury Collection Hotel, reopens this month with stylish new decor featuring art-deco-style furnishings, Saint Laurent marble floors, and bronze light fixtures, among other artful touches. The hotel has 159 rooms and suites (starting at about $785), including the more than 2,600-square-foot Appartement Parisien, which—with two floors of living quarters and a 914-square-foot terrace overlooking the city—is its most lavish accommodation. Other amenities inclu…