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.
(..) Okay. How are you? How are you? You've gotten big. Drink? Uncle Bob? Sarahlita, you pretty famous. All over the TV. Pictures of you. John, your big friend here. Cops are going nuts looking for you. Take the kid, honey, will you? I just came for my stuff. (..)1991 Terminator 2: Judgment Day