Museu Medeiros e Almeida
One of Lisbon’s lesser-known but most extraordinary museums, this is the former residence of collector António de Medeiros e Almeida. Every room of his late-19th-century mansion is filled with works of art ranging from paintings to ceramics, sculptures to furnishings. Highlights include paintings by Rubens and Tiepolo, a Rembrandt portrait, a silver tea set used by Napoléon, fountains originally from the Palace of Versailles, and what's said to be the world's most notable private collection of clocks. There are free hour-long guided tours each Saturday at 10:30 and 11:30 am.