Perfectly situated on one of the Upper East Side’s most prized blocks, this stunning brick and limestone townhouse is distinguished by its elegant façade and fortuitous placement just off Park Avenue on 70th Street. This sun-filled, gracious, and immaculate home underwent a rigorous three + year renovation by renowned architect Steven Harris. More than 10,000 square feet comprises five and a half stories, and a sixth fully finished lower level with a 28-foot Swimming Pool. A paneled elevator conveniently accesses all floors. The generous interior is complimented by three Gardens and three landscaped Terraces. Moreover, the residence has the rare good fortune of enjoying four exposures North, South, East, and West, largely over verdant gardens and treetops. Entry is through a gated garden and landmarked wrought-iron front door, opening into a paneled Vestibule and Foyer warmed by heated slab limestone floors, which flow seamlessly into a corner Den with wood-burning fireplace, a glazed Sunroom, and a separate Home Office, all with French doors opening onto the landscaped Courtyard Garden. A Powder Room is also conveniently nearby on this floor. A graceful ascending staircase leads to the exceptional Parlor Floor, which is introduced by a broad and welcoming landing and 12-foot ceilings. The tastefully proportioned square Living Room and Dining Room feature enchanting tree-line outlooks and wood burning fireplaces. There is also a Wet Bar and a Powder Room with separated water closet. The adjacent sun-splashed Kitchen is absolutely pristine and features a full complement of top-of-the-line appliances. The cheery Breakfast Room’s French doors lead directly to a landscaped terrace, which comfortably seats 6-8. This level is linked to the Courtyard Garden below via an external stair, facilitating circular flow through ground and parlor levels when entertaining outdoors. The divine Primary Suite on the third floor incorporates a Dressing Hall, a generous Bedroom with French doors opening onto a Balcony overlooking the Courtyard Garden, and a 20-foot Master Bathroom sheathed in marble and milk-glass, with radiant floor heating and a glass-roofed spa bath and shower area with a planted and irrigated indoor garden. A handsome paneled corner Library with window seat and wood burning fireplace complete this floor. Above on the fourth floor are two sunny square Bedrooms, both with wood-burning fireplaces, and each with en-suite Baths with radiant floor heating. Between these two bedrooms is a cozy central windowed Den with built-in work areas and arched reading nook. The fifth floor includes a pretty Guest Room with tented ceiling and en-suite Bath with radiant floor heating, a cleverly concealed Kitchenette and two additional South-facing Bedrooms that share a Bathroom and one of which currently functions as an Art Studio that opens onto a paved South-facing terrace. The sixth floor boasts a splendid Garden Room with limestone radiant floor heating, adjoining bath with walk-in shower, and a massive picture window overlooking an exquisite Japanese viewing garden designed by Shumyo Masuno that includes a mature Japanese maple set against a backdrop of river stones imported from Isamu Noguchi’s former private quarry in Japan. At the pinnacle of the house is a grassy Roof Garden with limestone-clad woodburning fireplace. The Lower Level offers a 650-bottle temperature-controlled Wine Cellar, Laundry Room, Workshop, mirrored Gym, split full Bath with steam shower, and limestone-clad Pool Room with chlorine-free 28-foot Swimming Pool and state-of-the-art dehumidification. This clean-lined residence is simply beautiful, and perfectly reflects the timeless good taste established by its exterior. The classic but updated floor plan, enhanced with every state-of-the-art convenience, is well-suited to both grand entertaining and tranquil private living.