The Pestana Palace Hotel is a refurbished palace located in the Belem district of Lisbon. I stayed at a junior suite for 3 days and it was superb. It was like staying in a palace and bring served and waited upon like royalty. The breakfast buffet was sumptous. It certainly lives up to its reputation of being among the leading hotels of the world.
The only drawback is that the hotel is located 6 km from the old town and is a 10 minute taxi tide or 30 minute bus ride away. To get to the number 15 tram, it is a 15 minute downhill walk.