A masterwork of interior design along with exquisite architectural elements, this 4 bedroom, 4.5 bath, full floor apartment in mint condition with private elevator foyer exudes a fabulous joie de vivre. Once the home of film star, Joan Fontaine, the apartment's unique architectural details include a rare 30 ft. living room, 10 ft. 5 ceilings, 4 fireplaces, beautiful moldings, huge casement windows, plus 3 exposures and a Juliet balcony overlooking picturesque townhouse gardens. The entrance gallery off the private elevator foyer, with its exquisitely patterned floor, hand painted silver wallpaper, and graceful overdoors introduces one to the impressive decorative elements in the apartment. The sleek glazed white walls in the 30 ft. living room define its volume and scale, emphasize the 10'5” ceiling and add glamour, reflecting the natural light from the tall casement window. Add the fireplace, bookcases, beautiful floor and black lacquered double doors and the living room is the perfect space for entertaining. There is a long enfilade from the living room through the library into the dining room for a lovely entertaining flow. In the library, Ms. Fontaine brought the ceiling beams, fireplace, and paneling from a monastery in Europe, all complimented by the arched windows with Juliet balcony. The 21ft. corner dining room with three exposures, fireplace, high ceiling, and 5 casement windows, is a burst of light and color in daytime, and enchanting in the evening with candlelight reflected in the mirrored walls. The large windowed chef's kitchen has a long butler's pantry with tremendous storage and offers custom cabinetry with marble countertops, top appliances including a Wolf stove, SubZero refrigerator, two additional freezer drawers, Miele dishwasher, and wine refrigerator. The laundry room with Miele washer/dryer is off the kitchen. The bedroom wing is accessed via a long hall with beautifully glazed walls. The sunny master bedroom, with fireplace, high ceiling and beautiful moldings, is in a quiet corner of the bedroom wing with south facing windows over gardens and a marble en-suite bath. The delightful second bedroom has charming blue wallpaper, beautiful moldings on the high ceiling and floor to ceiling French doors opening to a Juliet balcony overlooking gardens. An en-suite marble bath faces south. The sunny third bedroom with two tall windows overlooks gardens, and has an en-suite marble bath. The fourth bedroom offers colorful glazed walls and en-suite bath. This coveted cooperative was built by Kingdon Gould, grandson of Jay Gould, on the site of his townhouse in 1928, and designed by architects, Taylor & Levi. Kingdon Gould and his family occupied the top four stories of the building, which has been home to many notable personalities including Jacqueline Kennedy Onassis' sister, socialite-Princess Lee Radziwill. The building permits pied-a-terres, is pet friendly, and has a 24 hour doorman and resident property manager.