Introducing 859 St. Marks Avenue a truly majestic, south-facing five-story limestone mansion set on one of the most architecturally significant streets in the Crown Heights North Historic District. Directly facing the Brooklyn Childrens Museum and Brower Park, this extraordinary block is a celebrated showcase of turn-of-the-century architecture by the visionary designers who shaped Brooklyns residential legacya genuine feast for the eyes. Built in 1905 and spanning an impressive 25 feet in width, this 6,900-square-foot legal two-family residence has been thoughtfully updated while reverently preserving its most exquisite original details including the dramatic original staircase, stained glass windows, rich mahogany wainscoting, coffered ceilings, pocket doors and eight original fireplace mantelseach element telling a story of craftsmanship rarely found today. The home is Currently configured as two exceptional residences, offering magnificent space, light and endless possibilities. The grand owners unit spans four full floorsGarden through Fourthand features six-plus bedrooms, six and a half baths, and multiple gracious living and entertaining spaces. A lovely fourth-floor terrace provides open sky views, while the enchanting rear garden features an expansive bluestone patio beneath an Ipe pergola, raised vegetable beds, and a remarkable collection of edible plantings and fruit trees including Concord grapes, raspberry canes, rhubarb, red currants, Alpine strawberries, peach and apricot trees, and more. The fifth floor is a charming two-plus-bedroom, two-bath apartmentideal for income, guests, or extended family. Both units are equipped with in-unit washer/dryers, 5 zones of heating and central air conditioning , CAT6 wiring throughout, and fiber-optic (FiOS) connectivity in the cellar. An 8kW high-efficiency solar panel system provides meaningful energy savings. The full-footprint basement, with approximately 7-foot ceilings, offers abundant storage and additional utility space. Perfectly situated in the heart of the Crown Heights North Historic District, this exceptional home is moments from beloved neighborhood destinations including Chavelas, Muse Thai, Gertrudes, CentAnni, and more. The A, C, and 3 subway lines are just minutes away, offering easy access throughout Brooklyn and into Manhattan.