Britannica School : Western Painting - Impressionism
The first steps toward a systematic Impressionist style were taken in France in Monet’s coast scenes from 1866 onward, notably the Terrace (1866), in which he chose a subject that allowed use of a full palette of primary colour. The decisive development took place in 1869, when Monet and Renoir painted together at the resort of La Grenouillère on the Seine River. The resulting pictures suggest that Monet contributed the pattern of separate brushstrokes, the light tonality, and the brilliance of colour; Renoir the overall iridescence, feathery lightness of touch, and delight in the recreation of ordinary people. Working at Louveciennes from 1869, Pissarro evolved the drier and more-flexible handling of crumbly paint that was also to be a common feature of Impressionist painting.