Calling Rittenhouse Square B&B a bed-and-breakfast is a bit of a misnomer, as this place feels more like a small European hotel. Thankfully, there are no antique quilts or drafty bathrooms—each room is furnished with a large all-marble bath, antiques and lovely reproductions of Chippendale and Louis XVI pieces, and Frette linens and robes. Built by Walter Cope in 1911, the mansion has four floors accommodating 10 guest rooms and suites.