This extraordinary 4-bedroom + Office, 3 full bathrooms, 2 powder room condo redefines luxury living in the heart of The Magnificent Mile. Situated on one of the coveted penthouse levels atop the Four Seasons Hotel, revel in the grandeur of 11-foot ceilings and 4500 SF of living space. Crafted by renowned Chipman Adams Architects and designed by Laurie Demetrio Interiors, this residence is a masterpiece of sophistication and elegance. Every detail, from the sleek custom millwork to the stunning aquarium, speaks of unparalleled luxury. The home's primary living area encompasses a spacious layout that seamlessly accommodates a dining room, a family room featuring a cozy fireplace, a refined living room, a designated pool table room, and an additional bonus area complete with custom storage cabinets. This expansive space, while open, is thoughtfully designed with architectural elements that subtly delineate distinct functional zones. The gorgeous NuHaus kitchen showcases top-of-the-line appliances including Wolf wall ovens, steam oven, and induction cooktop. Sub-Zero full-size refrigerator and freezer, The Galley sink, and Dornbracht faucets complement the exquisite Quartzite counters and custom backsplash. The expansive primary bedroom boasts a lounge space and two large walk-in closets. The primary bathroom features a large steam shower with body sprays. Two separate water closets with Toto Washlet toilets, marble floors, shower, and countertops complete this spa-like oasis. Access to the first-class services and amenities of the Four Seasons Hotel with 24-hour room service, spa, pool and fitness center. Full service round-the-clock staff, pet friendly and the ultimate in lock-and-leave living. Ideal on-site parking. A unique opportunity awaits with the option to purchase either unit 6503, unit 6502, or both. Adjoined via French doors, these units offer endless possibilities, from a seamless combined living space to dedicated guest or staff accommodations.