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Photo: Helder da Rocha from Sao Paulo, Brazil, CC BY-SA 2.0 via Wikimedia Commons
The former Customs House for Rio has some fascinating decorations and is well worth the visit.
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Bolsa de Rio de Janeiro
Museu Naval e Oceanográfico
Installed in a building constructed in 1868, this museum preserves articles from the seafaring history of the city.
Museu Histórico Nacional
A museum of Brazilian history stretching from colonial to imperial times; big collection of paintings, but poor in artifacts.
French cultural centre built in 1820, with gallery and video hall.
Igreja de Nossa Senhora da Lapa dos Mercadores
Old Imperial Palace built in 1743 (though impressively modest). Colonial architecture.