Between spacious suites housed in historic buildings, posh digs attached to top-rated Italian restaurants, and even environmentally-conscious boutiques, the City of Brother Love has some of the best luxury stay options in the country. Keep on reading for our list of must-stay luxury hotels in Philadelphia!  1. Four Seasons: Best Luxury Hotel in Center City  Location: 1 N 19th St, Philadelphia, PA 19103 (Comcast Center)  Amenities: Spa & fitness center, infinity-edge pool, skyline suites, restaurants & cocktail lounge, and more!  When you think of posh hotels, Four Seasons is always a name that comes to mind. The Philadelphia location is situated in the Comcast Center and overlooks the beloved city…