Nestled atop a historic coop, this crown-jewel duplex Penthouse offers an unparalleled living experience with its commanding presence at the pinnacle of the building, feeling like a townhouse in the sky. Boasting four corners and spanning two levels, this remarkable residence features four spacious bedrooms and four luxurious bathrooms, accompanied by expansive, wraparound terraces that embrace breathtaking panoramic views. Upon entering, guests are welcomed by the elegance of beautiful hardwood floors and dramatic ceiling heights, setting the tone for refined penthouse living. The timeless prewar details harmonize seamlessly with smart, custom details such as central air conditioning, integrated AV, double moldings and modern sensibility. The gallery gracefully unfolds into three magnificent public rooms, plus the 4th bedroom en-suite seamlessly connected en enfilade. The grand living room, bathed in natural light from its corner position, offers captivating eastern, northern and western vistas to include eastern river views, while the adjacent wrap-around terrace invites outdoor relaxation with multiple seating areas. Opposite the living space, the dining room and chef's kitchen beckon with their spacious layouts and abundant natural light. The kitchen, a culinary haven, boasts high-end appliances and a gracefully arched ceiling, exuding both functionality and style. The dining room extends seamlessly onto the wraparound terrace, creating a seamless indoor-outdoor flow that enhances the home's allure, and provides additional stunning views south. A striking staircase, adorned with geometric motifs, and a dramatic skylight with a retractable, automatic shade leads to the upper level, where the primary bedroom, secondary bedroom, and third bedrooms await. A dedicated windowed laundry room, with sink plus ample storage provides great functionality for all laundry needs. The second bedroom en-suite offers superb light while boasting outstanding ceiling heights and generous proportions, ample storage, and panoramic views. The third bedroom is adjoined by a sizable terrace that flanks the entire length of this well-proportioned bedroom - providing breathtaking, unobstructed eastern, northern, and western views. The primary bedroom en-suite offers a tranquil sitting area and a sophisticated windowed bathroom adorned with rare, book-matched stone details. The custom detailed closets further fortify what sets this penthouse apart. Situated in the prestigious Upper East Side historic, Carnegie Hill district, this residence offers unparalleled convenience to Madison Avenue's renowned shops and restaurants, as well as proximity to New York City's finest museums, schools, and galleries. Moments from Central Park, this exclusive address epitomizes luxury living in the heart of Manhattan. Additionally, a 2% flip tax is to be paid by the buyer. 80% financing is allowed. Pet-friendly and pieds-a-terre permitted. Storage unit and bike storage available for rent at an additional cost.