The Pool at The Rittenhouse Hotel
The Rittenhouse Hotel's pool is acknowledged by professional reviewers writing for major publications. Of the 18 reviews tracked on TripExpert, 5 endorsed the pool, including Fodor's, Oyster and Gayot.
The Rittenhouse Hotel 
Fodor's
Oyster
Gayot
Lonely Planet
Star Service
Fodor's "Other amenities include an on-site salon and spa and a contemporary fitness center with sauna/steam services and a pool"
Oyster "The indoor pool and gorgeous spa are highlights, and the latter features a salon and sauna"
Gayot "Many of the spacious guest rooms offer views of downtown Philadelphia's Rittenhouse Square, as well as whirlpool bathtubs, mahogany furnishings, entertainment centers, mini-bars and marble bathrooms with separate dressing areas"
Lonely Planet "Of the downtown options with a pool, this is one of the nicest"
Star Service "Guests make full use of the indoor pool, sundeck and weight room, and the newly renovated spa is a stunning retreat with 12 treatment rooms, including two couples' suites, and the segregated men's and women's areas each provide saunas and steam rooms"
