High above Park Avenue, featuring soaring ceilings, views of the tree-lined avenue and the iconic Carlyle Hotel through expansive living room windows, and offering three bedrooms (flex four), a private landing, and three bathrooms, apartment 10B embodies the pre-war elegance and grace of a classic Upper East Side duplex. Apartment 10B also provides an open canvas for your imagination to create the home of your dreams. From the private elevator landing, an entry gallery leads to the sun-drenched corner great room measuring nearly 30 feet, which highlights a wood-burning fireplace, original hardwood floors, and six oversized windows directly over Park Avenue. The 10'3" ceilings-both downstairs and upstairs-lend to the airy, sunny atmosphere of an apartment that feels more like a private home than a Manhattan apartment. Off the grand living room is a dining area adjacent to a windowed kitchen. Three bedrooms and two full bathrooms are located upstairs. The corner primary bedroom faces west, with a large window overlooking Park Avenue. Options for new configurations include expanding the kitchen into a large eat-in chef's kitchen, adding a fourth bedroom and a home office in the former downstairs staff rooms, and combining two of the three upstairs bedrooms into a spacious primary suite with a dressing or lounging area. Built in 1909, this preeminent pre-war co-op features a full-time doorman, a stately high-ceilinged lobby with original marble floors, a live-in resident manager, private storage, and a state-of-the-art fitness center, completely renovated and upgraded in 2024. The building allows pets and 50% financing. There is a 2% flip tax.