An absolute masterpiece perched atop venerable 812 Park Avenue, this spectacular triplex penthouse takes inspiration from 18th-century European architecture and decorative arts. With divine private terraces, gorgeous proportions, and meticulous attention to every detail, this residence is truly splendid. A semi-private elevator landing opens to a generous and elegant Gallery with a sweeping staircase ascending to the levels beyond. The Gallery opens to a marvelous corner Living Room with a wood-burning fireplace, very tall ceilings, and views to the east and north over Park Avenue. Adjacent is a stately formal Dining Room. Beyond, a fully-equipped Butlers Pantry, accessible from the Gallery and the Dining Room, opens to the large and sunny state-of-the-art Kitchen. Completing the Entertaining Rooms and with views over Park Avenue is a divine Chinese-inspired lacquered Library with trompe lil paneling obscuring the Powder Room and Wet Bar, both finished with St. Laurent marble. All levels are accessed by the Gallery staircase or the very convenient internal elevator. The second floor features a luxurious Primary Suite comprised of a large corner Bedroom awash in sunlight, two very generous Dressing Rooms, and two bathrooms, finished in Calacatta Fabricotti and Botticino marbles, respectively. This area could easily be reconfigured to recreate an additional Bedroom or Sitting Room. Separated by a long hallway for privacy, there is another Bedroom with pretty open outlooks over the landmarked townhouses of 75th Street and an ensuite bathroom. Beyond, there is a Laundry Room and a double Staff Bedroom, also with an ensuite bathroom. The top floor of this very special residence is spectacular, as all rooms open onto a beautifully-landscaped wrap-around terrace with mesmerizing panoramic cityscape views. A handsome paneled Sitting Room features a wood-burning fireplace and opens directly onto the large terrace through two sets of French doors. Nearby, a stylish wood-paneled oval Dining Room, also with direct access to the very wonderful terrace, is supported by a complete catering Kitchen. There is an additional attractive Bedroom with an ensuite bathroom on this level. Each room seamlessly integrates the pristine interior rooms to the surrounding terraces, creating a remarkable and superb entertainment space. The terraces are gorgeous and impart a magnificent sense of sanctuary far above the city. The apartment has been entirely renovated, and all systems updated and brought to the highest standard, including all electrical and plumbing components, a seven-zone HVAC system, custom gallery-level lighting, and audio-visual systems. Details such as the thoughtfully chosen stonework in each bathroom, the herringbone and parquet de Versailles floors, new mahogany cased windows and doors, one-of-a kind hardware, and state-of-the-art appliances reflect the attention to detail that was lavished upon this renovation. The apartment is awash in lovely custom millwork throughout, including doors, paneling, casework, cabinetry, and trim. This very thorough and complete upgrade continues to the terraces, which were fully reconceived with new pavers, power, hidden irrigation, fencing, and a lush landscape design. 812 Park Avenue is a premier white-glove cooperative designed by the legendary J. E. R. Carpenter in 1927. Among its many significant architectural attributes, it features a classically grand and impressive lobby and a beautifully-landscaped central courtyard garden. Impeccable staffing includes a full-time doorman and porters, elevator attendants, and a resident manager. The building has a state-of-the-art private fitness center and offers individual storage units. Summer work rules. Pets are welcome. 30% financing permitted 2% flip tax payable by purchaser.