The mint condition, duplex penthouse at 1165 Park in Carnegie Hill feels like a townhouse in the sky and is truly one-of-a kind. Originally occupied by the family that erected the building in the 1920's, this front corner 15/16th floor apartment is flooded with light throughout the day. The apartment has high ceilings and expansive entertaining spaces (both indoor and out). The surrounding interior balcony on the 16th floor overlooks an enormous double-height entrance hall with a sweeping marble staircase and skylight. The apartment has 12 generously proportioned rooms all facing south or west. The lower floor is comprised of a corner living room, wood-paneled library, dining room, cloak and powder room, large eat-in kitchen, laundry room and double maids with bath. On the upper floor, there are 4 bedrooms, 3 windowed bathrooms, and a casual family room/playroom or 5th bedroom. French doors on the 16th floor open onto a wide, beautifully planted wrap terrace with sensational views south down Park Avenue and west across the Reservoir to the Central Park West skyline. The terrace easily accommodates several seating areas and private corner dining under a trellis. This apartment is truly one-of-a-kind and perfect for a family and/or entertaining.