Located in the prestigious and picturesque River House, this magnificent twelve-room duplex boasts shimmering East River views, remarkable scale, and pleasingly elegant proportions. Spanning approximately 5,300 square feet and with soaringly tall ceilings throughout, this expansive residence is further distinguished by its unique supplementary studio apartment with its own private entrance to East 53rd Street and via an internal private elevator that connects it to the duplex two floor above. The main residences central Gallery opens to the sun-flooded Living Room and Library, both with wood-burning fireplaces and sparkling East River views. The Living Room boasts perfect proportions, spans more than 35 in length, and is anchored by a deep, five-sided bay window. Adjacent, the Dining Room connects through elegant French doors. Beyond, a large Kitchen is supported by a proper Butlers Pantry, a Breakfast Room, a Staff Room and ensuite bathroom, as well as an additional large Bedroom and bath. A Powder Room and coat closet are conveniently accessible from the Gallery. Above, tranquil private quarters feature a delightful Primary Suite with sparkling views of the East River from the immensely large Bedroom and its adjoining Sitting Room, replete with a cozy corner fireplace. Both rooms open onto balconies overlooking the River, and the suite further incorporates very ample closets and two full baths. There are two additional Bedrooms, both with very ample closets and ensuite baths. All bedrooms benefit from glorious southern light and outlooks over the buildings beautiful courtyard gardens. In addition, the apartment transfers with a marvelous separate apartment with a private entrance on East 53rd Street. It also connects to the grand duplex apartment above by an internal private elevator. This unique, self-contained space incorporates a full bathroom, a kitchenette, very ample closets, and a step-down living space with very high ceilings. This bonus apartment has myriad possibilities and could be ideal as an exceptionally glamourous guest suite, a private gym or office, an artists studio, or screening room. River House is one of Manhattans finest and most discreet addresses. Designed by William L. Bottomly in 1931, this architecturally exquisite art deco building is notable for its elegantly gated entrance court and its inspired, light-filled lobby, which opens onto tiered gardens with views of the East River and beyond. Impeccable service includes two full-time doormen and a concierge, as well as a top resident manager, and private storage. Further, as a shareholder at River House and with the River House Board as ones sponsor, it is possible to join The River Club, located at the base of River House along the East River and with its own entrance on East 52nd Street (as well as a convenient internal door from the River House lobby). The River Club is an exclusive and storied social and sporting club that offers tennis, squash, a swimming pool and golf simulator, dining (and in-apartment catering and delivery to River House residents), guest rooms, and an array of social programs for adults and children. With sparkling and glorious views of the East River, grand proportions, and a design that lends itself perfectly to an extremely elegant lifestyle, this residence offers extraordinary amenities as access to membership at The River Club, this immensely grand duplex within one of New York greatest prewar buildings is truly an oasis from the brisk pace of the city.