Gare d'Orsay is a former Paris railway station and hotel, built in 1900 to designs by Victor Laloux, Lucien Magne and Émile Bénard; it served as a terminus for the Chemin de Fer de Paris à Orléans. It was the first electrified urban terminal station in the world, opened 28 May 1900, in time for the 1900 Exposition Universelle. After closure as a station, it reopened in December 1986 as the Musée d'Orsay, an art museum. The museum is currently served by the RER station of the same name.

The Compagnie du chemin de fer de Paris à Orléans (PO) was an early French railway company.