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Panteão Nacional
The huge dome of the Igreja de Santa Engrácia dominates the surrounding scenery. When work began in 1682, it was planned as one of Lisbon's grandest churches. After centuries of dithering and neglect, the sombre, marble edifice was inaugurated in 1966 (when the dome was finally completed) as the Panteão Nacional. It contains chilly marble cenotaphs to historic and literary figures.
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Pavilhão do Conhecimento
Lie on a bed of nails or play an invisible harp at the Pavilhão do Conhecimento, with lots of fun exhibits explaining scientific phenomena and pointing out how reality and perception often contradict. There's an indoor playground for three- to six-year olds, a free cybercafé and disabled access.
