The hotel is 'famous as' the place where the treaty was signed.
a 'famous' entertainer/explorer/athlete/politician
The hotel is (justly) 'famous for' its luxury.
(..) So this is what Dumbledore sends his great defender. A songbird and an old hat. Let's match the power of Lord Voldemort, Heir of Salazar Slytherin. . . . . .against the famous Harry Potter. Parseltongue won't save you now, Potter. lt only obeys me. No! Your bird may have blinded the basilisk, (..)2002 Harry Potter and the Chamber of Secrets
(..) and l'll get them signed. All of you wait outside. That's it. l'll bet you loved that, didn't you, Potter? Famous Harry Potter. Can't go into a bookshop without making the front page. Leave him alone. Look, Potter. You've got yourself a girlfriend. Now, now, Draco, play nicely. (..)2002 Harry Potter and the Chamber of Secrets