In the late 1860s, Claude Monet (1840-1926), Pierre-Auguste Renoir (1841-1919) and others painted in a new style, called Impressionism by contemporaries. The name was first used by critics, viewing a new exhibition held in 1874, and was directed precisely — and derisively — at a painting by Monet of a harbor at dawn, which he titled Impression: Sunrise. This painting is a striking example of the new style. How did Monet achieve the effect in this particular painting?