The Palais Garnier also houses the Bibliothèque-Musée de L'opéra de Paris(Paris Opera Library-Museum),
which is managed by the Bibliothèque Nationale de France and is included in unaccompanied tours of the Palais Garnier.
When the emperor was deposed on 4 September 1870 as a result of the disastrous Franco-Prussian War, the government was replaced by the Third Republic, and almost immediately, on 17 September 1870,
the Opera was renamed Théâtre National de L'opéra, a name it kept until 1939.