This grand and sophisticated duplex residence is located in the esteemed Rosario Candela-designed building at 770 Park Avenue in the heart of the Upper East Side. The apartment boasts a gracious layout with superb prewar details throughout. The entertaining rooms and three of the four bedrooms have an eastern exposure overlooking Park Avenue. Upon entering, you are greeted by an impressive entrance gallery with a sweeping curved staircase. The dramatic 30-foot living room with a wood-burning fireplace is sun-flooded through floor-to-ceiling windows with Juliet balconies. It is adjacent to the library with its own wood-burning fireplace and handsome built-in bookcases. The beautifully proportioned corner formal dining room is ideal for entertaining. The windowed gourmet eat-in kitchen offers custom cabinetry, ample countertops, two Subzero refrigerators, Viking 6-burner range, an additional oven, two sinks, two dishwashers and an icemaker. A staff room with full bath is conveniently located off the kitchen, as is a windowed laundry room that leads to the secondary staircase. The upper level houses four bedrooms, including the sun-filled corner primary bedroom which features two large closets, a decorative fireplace and a spacious windowed ensuite bath. The secondary bedrooms are all generously proportioned with large ensuite baths and abundant closet space. There is also an office and second staff room with full bath on this floor. Additional features of this residence include dentil or acanthus moldings distinctive to each of the public rooms, herringbone floors, through the wall air-conditioning, a powder room and ample storage throughout. A separate staff room located on the third floor of the building is included in the sale. Built in 1930, 770 Park Avenue is a prestigious white-glove cooperative that is comprised of 42 residential units. The building is fully staffed with full-time doormen and a live-in resident manager. Additional amenities include a fitness center, laundry room, private storage and wine storage. Renovations are permitted between May 15th through September 15th. The building does not permit financing and there is a 3% flip tax payable by the purchaser. Pets and pied-a-terres are permitted with board approval.