While the T-shaped space in the tower was not useful as modern offices, it has an ideal shape for hotel rooms. The conversion of the tower to a hotel was led by project principal Arthur Jones of Bower Lewis Thrower Architects and preservation consultant Robert Powers of Powers and Associates. Since the building is a National Historic Landmark and is listed on the Philadelphia Register of Historic Places, all changes to the building were monitored by the National Park Service, the State Historic Preservation Office, and the Philadelphia Historical Commission. The Loews Philadelphia Hotel contains 581 guestrooms including 37 suites in a total building area of 631,006 sq.ft. The hotel features square feet of function space in three ballrooms and fourteen conference rooms. The hotel also offers a 31st-floor Concierge Library and fifth-floor spa, pool, and fitness center.