Located on the 12th and 13th floors of Park Avenue's most distinctive prewar cooperative, this magnificent 18-room front corner duplex apartment offers unparalleled grandeur and scale. Resplendent with outstanding natural light streaming in from 38 windows, the sprawling residence features a graceful layout with beautiful hardwood flooring, soaring ceilings, classic moldings, 5 fireplaces and a small planting terrace. A private elevator vestibule opens to a 35-foot marble gallery off of which opens a baronial corner living room, a south facing library, a study over looking Park Ave and a vast dining room. There is also a gracious Powder Room. Beyond there is a big traditional kitchen, pantry, servants hall and two maids rooms. Upstairs the private quarters boast four large bedrooms with ensuite baths, a most gracious and private two bedroom master suite and four additional staff rooms. This is a spectacular residence that ranks as one of Rosario Candela's true architectural masterpieces.