A rare and remarkable offering, this exceptional custom estate is the only private residence currently available within the coveted Mayacama Golf Club. A masterpiece of Old World European architecture and irreplaceable craftsmanship, this distinguished property showcases a level of artistry, materials, and architectural detail that would be extraordinarily difficult and costly to recreate today. An imported Italian hand-laid stone driveway welcomes you to this enchanting castle, gracefully set among majestic oak and olive trees, mature landscaping, and professionally designed gardens. Multiple stone terraces, a tranquil tea garden, an infinity-edge pool, a pergola, and a stone hearth with wood-burning fireplace create an extraordinary setting for relaxation and elegant entertaining. A private bocce court, chipping and putting green, and irrigated garden complement the sweeping views of Mayacama rolling hills. Inside, grand archways, custom Venetian plaster walls, handmade French wood doors, and beautifully crafted French oak flooring establish an atmosphere of timeless sophistication. The magnificent great room features soaring cathedral ceilings with hand-hewn wood beams, custom arched bookshelves, and expansive French doors that seamlessly connect the interiors to lush gardens and inviting outdoor living spaces. Broad hallways, rich textures, and soft, refined hues enhance the home's graceful flow and understated grandeur. Designed for the discerning chef and gracious entertaining, the gourmet kitchen features custom cabinetry, marble countertops, a wood-block island, European tilework, and premier Miele, Wolf, and Sub-Zero appliances. The kitchen opens effortlessly to the formal dining room and great room, while expansive terraces provide an exceptional backdrop for intimate gatherings and grand celebrations. Crestron home automation, Lutron lighting controls, and integrated surround sound deliver modern convenience. The luxurious primary suite offers a private sanctuary with its own fireplace, terrace, and secluded gardens. Four additional en-suite bedrooms provide elegant accommodations, complemented by a separate lower-level room and bath. Additional highlights include a private study or home office, an impressive 1,200-bottle wine cave, and a 2 + car garage with dedicated golf cart parking and storage room. Mayacama Club membership is optional. A truly exceptional opportunity to experience luxury Wine Country living at its finest.