Rarely available prewar condominium on Park Avenue. This one-of-a-kind trophy home is being offered for sale for the first time in nearly 30 years. Meticulously maintained by its current owner, this sophisticated residence is in excellent condition and exudes an old world elegance from a bygone era. The grand and gracious layout boasts a formal entry gallery that leads to a wood-paneled library and formal living room (both overlooking Park Avenue), a formal dining room with a built-in china closet, and a private master suite with an enormous and simply stunning art deco bathroom. The large windowed eat-in kitchen has a separate pantry closet and a powder room. The apartment features two fireplaces (one decorative and one gas that could be made to work), an abundance of storage (including a large fully outfitted walk-in closet in the master bedroom), original moldings throughout, beautifully maintained hardwood floors, 10'5" ceilings, and a washer/dryer.Built in 1911 and designed by William A. Boring, 521 Park Avenue is a white-glove pet friendly condominium with a gym and is situated on the corner of 60th Street and Park Avenue, across the street from the Regency Hotel and is seconds from Central Park and some of the city's finest restaurants and shops including Sant Ambroeus, Nello, Amaranth, Vaucluse, Le Bilboquet, Barneys New York, Hermes and Bergdorf Goodman. Pied-a-terres, foreign purchasers and investors are welcome!