One-of-a-kind masterpiece mansion ($58,500,000), blending modern building techniques with true old-world elegance, fronting Hayground Cove in Water Mill South. Set on a generous four acres, with a regular-apportioned lot on the water, the grounds are magnificently landscaped for maximum privacy. The main residence opens with a grand, double-hearth staircase in cast bronze and silver & gold leaf, with an early 19th-century, stained glass skylight. Fully-automated, the house comes complete with state-of-the-art remote-control security and Crestron entertainment systems. No detail was spared, with over 120 exterior brackets, coffered ceilings in both library and living room, plus coffered cross beams in the living room. Grand master suite, four separate guest suites, three staff bedrooms, two powder rooms & eight fireplaces with 100-year-old mantelpieces. Restaurant grade kitchen designed by Mark Stech-Novak, and finished lower level with theater, wine storage, spa, sauna, and gym.