Museu Nacional de Arte Antiga

The only museum in Lisbon to approach the status of the Gulbenkian is the Ancient Art Museum. In a 17th-century palace, it has a beautifully displayed collection of Portuguese art -- mainly from the 15th through 19th century -- that superbly complements the Gulbenkian's general collection. Indeed, Gulbenkian himself donated several pieces to this museum, which opened in 1883. It's very cheap as well so it's a must for every traveler!