How many stars do you assign for a first-class hot...

How many stars do you assign for a first-class hotel that is world-famous as a piece of French history and is also architecturally worth seeing, even if you have not stayed in it? I chose 5 stars.
A city palace on Place de la Concorde from 1758, which has been used as a hotel since 1909. Today the Crillon belongs to the Rosewood Hotels as one of the "Leading Hotels of the World". It has only 74 rooms but also 44 suites.
The guest list reads like a who's who of politicians, film and music greats with i.a. Helmut Kohl, Theodore Roosevelt, Richard Nixon, Emperor Hirohito of Japan or King George V of the United Kingdom, Charlie Chaplin, Orson Welles, Elizabeth Taylor or Arnold Schwarzenegger and Madonna.