This home in the sky offers elegant indoor and outdoor entertaining spaces complemented with five bedrooms, a library, a sky room, five full baths, and two powder rooms. A truly spectacular Penthouse residence with incredible outdoor space and low maintenance. Hummingbirds, blue jays, and mockingbirds are frequent visitors on the terrace of this spectacular, sunny penthouse with glorious views. Situated atop one of Park Avenue's most prestigious white glove co-operatives, this fabulous prewar residence presents the opportunity to own one of the most exciting apartments in New York City. A dedicated elevator landing leads to a magnificent entrance gallery with a 24' domed ceiling above a sweeping marble staircase surrounded by windows. All major rooms flow off this gallery. The baronial, south facing, living room has open city views, and a wood burning fireplace with an 18th century French limestone mantel. The formal dining room with a wall of windows retains its original coffered ceiling, affords an elegant space for formal entertaining and houses a custom 700 bottle wine cellar. The handsome library has river views and maintains its original wood paneling, pegged wood floors and plaster ceiling - all meticulously restored to its Old-World splendor. A huge, gourmet, chef's kitchen is equipped with top-of-the-line appliances and custom cabinetry. Adjoining the kitchen is a breakfast room with custom built-ins, stone floors and incredible storage space. The corner master bedroom suite has south and east exposures with open city and river views. The suite includes a traditional mahogany paneled dressing room, an enormous bedroom wrapped in custom cabinetry and handcrafted woodwork, a south facing study (or fifth bedroom) with open city views and two full bathrooms finished in exquisite marbles, onyx and custom tiles. There are three additional oversized bedrooms all with en-suite bathrooms, amazing views and incredible closets. There is a guest powder room on each level of the residence. Surrounding the original sweeping marble staircase is an upper gallery with six Palladian windows. Off the gallery is a spectacular sky room wrapped in windows with a wood burning fireplace with an exquisite mantel and a guest powder room. French doors open onto the stunning 2,850 sq. ft. landscaped wrap terrace which is ideal for alfresco dining, sunbathing and relaxing while looking at gorgeous views of New York City and the river.