Alléno

Chef Yannick Alléno took over the historic Pavillon Ledoyen on the Champs-Élysées in 2014, opened his eponymous restaurant on its top floor, and had three Michelin stars seven months later. The thing that sets his cooking apart is a near-religious focus on sauces — he rebuilt them from scratch using extraction and fermentation techniques he developed himself, and calls the result Modern Cuisine. The room is a listed historic monument with early-1900s detailing and windows over the Petit Palais, and the service runs on a "table concierge" idea where the team learns your preferences before you even arrive. Three Michelin stars and a World's 50 Best name. Booking is genuinely hard — plan weeks out.