First Offer---This Rare Prewar 14-room Penthouse triplex overlooks the East River from baronial-sized rooms with an estimated 6,030 square feet. The Penthouse is surrounded by 2 landscaped wraparound terraces that total over an estimated 2,500 square feet. This stately residence has served as the home of Ireland's Ambassador to the United Nations since 1957. The co-op includes 6 bedrooms, a formal dining room, library, a den, an office, 2 kitchens, a breakfast room, 2 fireplaces, 4 bathrooms and 2 powder rooms. The primary suite has a dressing room---all overlooking the water. The Penthouse offers a grand entertaining space with 10-foot ceilings and tranquil water views. The unit has great style and architectural bones.