Designed by J.E.R. Carpenter and occupying the coveted southwest corner of 1150 Fifth Avenue, this extraordinary duplex-created from the seamless combination of two B-line residences-commands grand proportions, southern and western light, and iconic Central Park views. Spanning an impressive eighteen into fourteen rooms, the residence unfolds with remarkable scale, offering seven bedrooms, five renovated windowed full bathrooms, and a powder room. The layout includes a living room with a wood-burning fireplace, a formal dining room, two corner libraries, a study, and an enormous windowed eat-in kitchen. Defined by high ceilings, hardwood floors, five-zone central air conditioning, and bespoke finishes throughout, the home offers a level of volume and scale rarely found. A semi-private elevator landing opens to an elegant foyer and an impressive 20-foot-long entrance gallery, from which the home's grand entertaining spaces unfold. The living room faces west over Fifth Avenue and Central Park, with two oversized windows framing picturesque park views. A corner library has both southern and western exposures through three large windows. Adjacent is a windowed powder room. Also off the gallery is an elegant formal dining room, perfectly suited for entertaining, as well as a study with custom built-ins. The windowed eat-in kitchen is both expansive and thoughtfully designed, featuring custom cabinetry, a large center island with seating, an oversized breakfast area, and a built-in desk. It is outfitted with top-of-the-line appliances, including a Sub-Zero refrigerator and freezer, Viking range with griddle and oven, two Miele dishwashers, two microwaves, and two Shaw's sinks. A large pantry offers a second Sub-Zero refrigerator and freezer, a EuroCave wine refrigerator, and exceptional storage. This floor has two large bedrooms and a windowed hallway bathroom. The lower level is dedicated to private living quarters. The primary suite overlooks Central Park and includes two large dressing rooms and a windowed, renovated bathroom with a shower. A second corner library on this floor has both southern and western exposures. There are four additional bedrooms, each with built-in bookshelves and excellent closet space, along with two windowed hallway bathrooms both with two sinks-one with a shower and the other with a bathtub. A central media room provides an inviting gathering space, complemented by an additional windowed bathroom with a shower, a large storage closet, and a well-equipped laundry room with a side-by-side LG washer and dryer, sink, and ample storage. A mudroom with cubbies and a closet completes this floor. The elevator goes to both floors. A storage bin is assigned by the building, and they permit up to 70% financing. There is a 2% flip tax paid by the purchaser. Built in 1924, this premier white-glove cooperative is ideally located on Fifth Avenue in Carnegie Hill and offers a full-time doorman, live-in resident manager, central laundry room, bicycle room, a state-of-the-art fitness center, and a beautifully landscaped roof garden with sweeping Central Park views.