Bright and well-appointed one-bedroom on the sunny Marlborough Street side of the historic Barnes Mansion. A thoughtfully designed layout maximizes space and livability, with high ceilings and hardwood floors enhancing the living and dining areas. Recent improvements include newly replaced heat and AC, recessed dimmer lighting throughout, an updated bathroom, and three new oversized Pella historic double-pane windows that deliver excellent natural light while preserving the building's architectural character. The kitchen features white cabinetry, granite countertops, and stainless steel appliances. A spacious bedroom with custom closet system, in-unit washer and dryer, and separate private storage complete the home. Residents of this professionally managed elevator building enjoy a common patio, library, and bike storage, all in a prime Back Bay location near Newbury Street, the Esplanade, Kenmore Square, BU, Berklee, the Longwood Medical Area, and the T. Ideal for an owner-occupant, investor, or pied-à-terre.