Fine architectural details, grand rooms and a terrace distinguish this apartment in a mansion townhouse. This duplex apartment is one of four units in a landmarked elevator house that is 25 feet wide. Built in 1856 as the showpiece residence of a successful entrepreneur, this building is located between Park and Lexington Avenues in the Murray HIll Historic District. The building has a neo-Georgian facade designed by Samuel Edson Gage, the prominent architect of homes in the Upper East Side historic district. On the parlor floor is the living room which spans the width of the building. The ideal place to hang an art collection, it has soaring ceilings, dentil and floral moulding, herringbone floors, three large windows and a wood-burning fireplace. Also, on the parlor floor are the dining room and the kitchen. You can seat twenty for dinner in the dining room, which has a fireplace and a lovely view into the garden. There is also a study, a possible guest or staff room, with a full bath. An additional half bath contains a washer and dryer. At the top of the stairs, french doors lead to a professionally designed and planted terrace, with an irrigation system and lighting. Immediately to the right is a library with a fireplace, a wet bar and windows facing south over the garden. Behind the library is a master bedroom suite with a dressing room and two marble bathrooms. Extensive closets provide abundant storage. There is also a storage closet outside the second-floor entrance to the apartment, and another large private storage unit in the basement. The apartment has entrances on both floors, so that luggage may be brought directly to the top floor using the building elevator. The cooperative has a porter and a managing agent. Located near a major museum and a consulate, restaurants, a Fairway supermarket and the 33rd Street subway stop, this private, serene apartment offers the spacious feeling of a house. Pet friendly building.