Perched atop one of Manhattan's most desirable addresses, this magnificent 12-room terraced prewar penthouse offers stunning views overlooking the East River. Grandeur of scale, extraordinary room proportions and the finest finishes and appointments characterize this brilliantly designed architectural masterpiece. The apartment features 5 bedrooms plus a library, a wide wrap-around terrace, 2 balconies and four wood-burning fireplaces. Soaring ceilings, walls of windows, skylights, classic moldings, expertly crafted millwork and pristine hardwood flooring may be found throughout the home. One enters the apartment from a private elevator landing which leads to a 29-foot windowed gallery. The gracious public rooms include a living room, dining room and library; encompassing a 66-foot expanse overlooking the River. The ceiling height is 12-feet and there are oversized windows, two wood-burning fireplaces and two balconies. The library opens onto an enchanting 73-foot South terrace, which has been beautifully landscaped. The corner master suite also overlooks the South terrace; and has a vast walk-in-closet, a wood-burning fireplace, and a luxuriously-appointed oversized marble bath with a window. There are two additional bedrooms off of a private corridor, each with terrace overlooks and windowed baths. The apartment has a windowed Chef's eat-in-kitchen with skylights outfitted with custom cabinetry and top-of-the line appliances, ample room for dining and access to the West terrace. There is a large storage room and a double-staff room with a large full bath and skylight along this Western wing. The upper level has two sunny bedrooms; one of which has a triple exposure; and a renovated full bath with a window. Ample closets may be found throughout the home and there is 2-zone central-air-conditioning. Built in 1930, 10 Gracie Square is a white glove, full-service cooperative. Amenities in the building include a full time doorman, attended elevator, driveway, garage, garden, fitness center, squash court, basketball court and storage.