Nestled within a lovely brownstone with an elevator on a landmarked, tree-lined block just off Park Avenue, this charming duplex residence offers a rare combination of prewar character, gracious proportions, and exceptional light. The main level welcomes you with an enchanting south-facing living room with soaring 10'5" ceilings, bathed in natural sunlight and centered around a stunning decorative fireplace that serves as the home's focal point. Adjacent to the living room is a formal dining room, creating an ideal setting for entertaining. Currently open to the living room, this versatile space can easily be converted into a third bedroom, home office, or den to suit your needs. A kitchen and powder room complete this level. A graceful staircase leads to the upper floor, also with 10' 5" ceilings, where two south-facing bedrooms enjoy wonderful natural light and tree-top views. Additional features include hardwood floors, original shutters, an in-unit washer/dryer and private storage in the basement. Built in 1869, this intimate six-unit 19th Century co-operative offers a timeless sense of elegance. Pets are not permitted and there are two monthly assessments of $233 and $977 per month.