Paço de São Cristóvão was an imperial palace located in the Quinta da Boa Vista park in the Imperial Neighbourhood of São Cristóvão, Rio de Janeiro, Brazil. It served as residence to the Portuguese Royal Family and later to the Brazilian Imperial Family until 1889, when the country became a republic through a coup d'état deposing Emperor Pedro II. The palace briefly served as a public building by the provisional government for the constituent assembly of the first republican constitution. It housed the major part of the collections of the National Museum of Brazil, which, together with the building, were largely destroyed by a fire on 2 September 2018.