Impressionism, a major movement, first in painting and later in music, that developed chiefly in France during the late 19th and early 20th centuries. Impressionist painting comprises the work produced between about 1867 and 1886 by a group of artists who shared a set of related approaches and techniques. The most conspicuous characteristic of Impressionism in painting was an attempt to accurately and objectively record visual reality in terms of transient effects of light and colour. In music, it was to convey an idea or effect through a wash of sound rather than a strict formal structure.
The principal Impressionist painters were Claude Monet, Pierre Auguste Renoir, Camille Pissarro, Alfred Sisley, Berthe Morisot, Armand Guillaumin, and Frédéric Bazille, who worked together, influenced each other, and exhibited together. Edgar Degas and Paul Cézanne also painted in an Impressionist style for a time in the early 1870s. The established painter Édouard Manet, whose work in the 1860s greatly influenced Monet and others of the group, himself adopted the Impressionist approach about 1873.
Radicals in their time, early Impressionists violated the rules of academic painting. They constructed their pictures from freely brushed colours that took precedence over lines and contours, following the example of painters such as Eugène Delacroix and J. M. W. Turner. They also painted realistic scenes of modern life, and often painted outdoors. Previously, still lifes and portraits, as well as landscapes, were usually painted in a studio. The Impressionists found that they could capture the momentary and transient effects of sunlight by painting outdoors or en plein air. They portrayed overall visual effects instead of details and used short "broken" brush strokes of mixed and pure unmixed colour—not blended smoothly or shaded, as was customary—to achieve an effect of intense colour vibration.