Few destinations bear such illustrious provenance.
Owners Hinduja Group and Onex Holding invested more than $1.6 billion into the endeavor, entrusting an array of experts to balance historical preservation with modern functionality. EPR Architects, led by director Geoff Hull, was appointed in 2014 to manage the feat, alongside Accor’s Anne Becker-Olins, global chief design and technical services officer, ultra luxury and luxury, who joined the project in 2018. The late Thierry Despont and his studio designed the 120 guestrooms and suites, the ballroom, and Spy Bar, while 1508 London created 85 branded residences. Local studio Winch Design conceived the seventh-floor penthouse, and Goddard Littlefair devised the showstopping four-story Guerlain Spa.
There, timber floors, polished plaster, antiqued brass, and feature stones comprise a rich palette that nods to the building’s origins. “One of the standout moments is the descent from the gym down to the pool. The sculptural staircase is a moment of drama and glamour that really does take your breath away,” says the London firm’s cofounder and director Jo Littlefair. “We wanted every part of the journey through the space to feel special and transformative. Once you’re inside, you are cocooned away, able to relax from the hustle and bustle of the city above you.”
The property is also home to nine restaurants, with three helmed by chef Mauro Colagreco, including the AB Concept-designed Paper Moon. Featuring a warm palette with gold accents, it unites the building’s historic architecture with the restaurant’s Milanese roots in “a delicate dance that balances the past with the present,” says firm cofounder Ed Ng.

