Musée Marmottan Monet

One painting here gave a whole movement its name. In 1874 Claude Monet showed a loose, misty view of the harbour at Le Havre at dawn, an orange sun over grey water, and called it 'Impression, Sunrise'. A hostile critic seized on the word 'impression' to mock the young painters as unfinished, and the insult stuck as a label: Impressionism.

That canvas hangs in the Musee Marmottan Monet, a 19th-century mansion near the Bois de Boulogne that the art historian Paul Marmottan left to the nation with his own collection. The museum's character changed in 1966, when Monet's son Michel left it the paintings he had inherited from his father, turning it into the largest holding of Monet in the world, including the late water-lily canvases from the garden at Giverny.

In October 1985 armed men walked in during opening hours and took nine pictures, 'Impression, Sunrise' among them. For five years it was gone. The trail ran through organised crime as far as Japan before the paintings were found in a villa in Corsica in 1990 and brought back. Today the picture that named Impressionism hangs in a room downstairs, watched a little more closely than before.