The Radisson Plaza-Warwick Hotel Philadelphia is rich in tradition, as it has been servicing elite Philadelphians and guests for many years. Listed on the National Register of Historic Places, the Radisson Plaza-Warwick Hotel was originally constructed in 1926 and features fashionable English Renaissance architecture. Transformed to meet the uncompromising standards of today's travelers, the 299-room Philadelphia Hotel is located just off the world-renowned Rittenhouse Square, the city's most prestigious residential, commercial and business district.