Rosario Candela’s Georgian masterpiece at 720 Park Avenue is home to a south-facing, elegant 14-room duplex originally designed for a member of the Strauss family, the founders of Macy’s. Highlights of the approximately 7,000-square-foot apartment are a large gallery with lovely circular staircase, powder room, charming bar, and four exceptionally proportioned reception rooms, including a sunken 30-foot living room with adjacent terrace. The service area has an enormous gourmet kitchen and breakfast room. The upper floor features six bedrooms with six ensuite marble baths and dressing rooms, including a romantic firelit master suite. The ceiling heights range from 11 to 12 feet, with meticulously restored plaster moldings accenting four fireplaces with period antique mantels. Private wine and storage rooms are included, and the building features abundant staff, a squash court, and large professionally equipped gym.