Perched high above Park Avenue at the apex of Carnegie Hill, this sophisticated 10 into 9 room prewar gem offers elegant living on the Upper East Side. This sun-drenched, 12th Floor corner residence offers soaring 10' 6" ceilings, gracious and glamorous living space, stunning original detail and open views in every direction. The large, square entry foyer leads to a beautifully proportioned living room with fireplace, ten-foot ceilings, oversized windows, stunning hardwood floors, and captivating western exposures overlooking the bell tower of Brick Church. The elegant dining room connects to a stunning corner library that boasts a sweeping double exposure with northern views up Park Avenue. A large gallery with custom bookcases and skylight leads to the oversized chef's kitchen, featuring high-end stainless-steel appliances, custom Bulthaup cabinetry, a separate pantry, a large center island, and a separate breakfast dining area with built-in banquette. The primary suite is a true retreat (originally 2 rooms) with a wall of windows plus sitting area, two full bathrooms on opposite sides of the room, a custom dressing area, two walk-in closets, and a marble bath with a shower and soaking tub. Three additional large bedrooms, two with ensuite baths and enormous closets, plus an additional guest bedroom/home office and hall bath complete the home. There is a separate laundry room with ample storage. Centrally air conditioned throughout. 1155 Park Avenue is a pet-friendly, full-service luxury cooperative building built in 1915 by Bing and Bing, with 24-hour doorman, live-in super, gym, bike room, and laundry room. 40% financing. 2.5% flip tax. Co-exclusive.