Set along Chicago's most storied lakefront enclave, 199 East Lake Shore Drive, Unit 4W, presents a rare opportunity to own a grand duplex in a distinguished Beaux-Arts cooperative. Designed in 1913 by Benjamin Marshall, this boutique building offers timeless elegance and full-service living, including 24-hour door staff, an on-site engineer, fitness room, and heated garage. Spanning upwards of 4,000 square feet, 4W is an updated 3 bed/3.1 bath residence that blends classic European sophistication (think plaster walls and intricate millwork) with modern comfort. A rotunda-style foyer with stone flooring and a sweeping curved staircase introduces interiors defined by herringbone hardwood floors, high ceilings, and original pocket doors. The lake-facing living room is a standout, featuring an original fireplace and oversized windows with sweeping Lake Michigan views, offering an elegant setting for both entertaining and everyday living. A formal dining room with custom built-ins enhances the home's refined character. The thoughtfully designed kitchen includes white custom cabinetry, marble countertops, a hammered metal sink, and premium appliances. A breakfast area, butler's pantry, and adjoining family room add functionality and warmth. Upstairs, the expansive primary suite offers a serene retreat with a sitting room, walk-in closet, and spa-like bath with sauna. Two additional en suite bedrooms provide comfort and flexibility, completing this exceptional lakefront residence. Steps from the lakefront, Oak Street, and the Magnificent Mile, this one-of-a-kind home places the city's finest offerings within easy reach.