Lisbon's best and most luxurious hotel is in this 19th century palace classified as a national monument, in a quiet location and with wonderful river views. This is where major international celebrities stay in Lisbon, with the most famous case being Madonna who featured the hotel in her "I'm Going to Tell You a Secret" documentary DVD. In addition to the beautifully-furnished rooms, there's a landscaped botanical garden and a marble outdoor pool, a modern health club and a high-quality gourmet restaurant.