Coordinates: 48°51′36″N 2°19′37″E / 48.860°N 2.327°E / 48.860; 2.327

The Musée d'Orsay (French pronunciation: [myze dɔʁsɛ]) is a museum in Paris, France, on the left bank of the Seine. It is housed in the former Gare d'Orsay, an impressive Beaux-Arts railway station built between 1898 and 1900. The museum holds mainly French art dating from 1848 to 1915, including paintings, sculptures, furniture, and photography. It is probably best known for its extensive collection of impressionist and post-impressionist masterpieces (the largest in the world) by such painters such as Monet, Manet, Degas, Renoir, Cézanne, Seurat, Sisley, Gauguin and Van Gogh. Many of these works were held at the Galerie nationale du Jeu de Paume prior to the museum's opening in 1986.

The museum building was originally a railway station, Gare d'Orsay, constructed for the Chemin de Fer de Paris à Orléans and finished in time for the 1900 Exposition Universelle to the design of three architects: Lucien Magne, Émile Bénard and Victor Laloux. It was the terminus for the railways of southwestern France until 1939.

Coordinates: 48°41′57″N 2°11′15″E / 48.6993°N 2.1875°E / 48.6993; 2.1875

Orsay (pronounced: [ɔʁ.sɛ]) is a commune in the Essonne department in Île-de-France in northern France. It is located in the southwestern suburbs of Paris, France, 20.7 km (12.9 mi) from the center of Paris.

Inhabitants of Orsay are known as Orcéens.

There has been a village called Orsay on this site since 999, and the first church there was consecrated in 1157. From the sixteenth century, the town and surrounding area were owned by the Boucher family, and it was in honour of this family that Louis XIV gave the quai d'Orsay its name. This is the reason that the Musée d'Orsay is not in Orsay. In the eighteenth century, the family of Grimod du Fort bought the land and received the title of comte d'Orsay. In 1870, during the Franco-Prussian war, Orsay was occupied by the Prussian army. 88 young "Orcéens" were killed in the First World War.

In 1957, largely due to the influence of Frédéric and Irène Joliot-Curie, the Institut de physique nucléaire (nuclear physics institute) was opened in the Chevreuse valley, and the region, especially Orsay, became an important scientific centre. Another development was the creation of the Université de Paris-Sud, whose most important faculty is the faculty of science.