The building housing the Musee d'Orsay 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. That explains the huge clocks on the building which
served as inspiration for Martin Scorsese's movie "Hugo".

The museum holds mainly French art dating from 1848 to 1914, including paintings, sculptures, furniture, and photography. It houses the largest collection of impressionist and post-Impressionist masterpieces in the world, by painters including Monet, Manet, Degas, Renoir, Cézanne, Seurat, Sisley, Gauguin, and Van Gogh.

It's a great museum to visit. We find it far more pleasurable than the Louvre due to the open architecture and the artwork on display.