The Chestnut Trees at Osny

Impressionism was a 19th-century art movement that originated with a group of Paris-based artists whose independent exhibitions brought them to prominence during the 1870s and 1880s in spite of harsh opposition from the art community in France. The name of the style is derived from the title of a Claude Monet work, Impression, soleil levant (Impression, Sunrise), which provoked the critic Louis Leroy to coin the term in a satiric review published in the Parisian newspaper Le Charivari.

Characteristics of Impressionist paintings include relatively small, thin, yet visible brush strokes; open composition; emphasis on accurate depiction of light in its changing qualities (often accentuating the effects of the passage of time); common, ordinary subject matter; the inclusion of movement as a crucial element of human perception and experience; and unusual visual angles. The development of Impressionism in the visual arts was soon followed by analogous styles in other media which became known as Impressionist music and Impressionist literature.

Impressionism also describes art created in this style, but outside of the late 19th century time period.

Camille Pissarro (French pronunciation: [kamij pisaʁo]) (10 July 1830 – 13 November 1903) was a French Impressionist and Neo-Impressionist painter born on the island of St Thomas (now in the US Virgin Islands, but then in the Danish West Indies). His importance resides in his contributions to both Impressionism and Post-Impressionism, as he was the only artist to exhibit in both forms. Pissarro studied from great forerunners, including Gustave Courbet and Jean-Baptiste-Camille Corot. He later studied and worked alongside Georges Seurat and Paul Signac when he took on the Neo-Impressionist style at the age of 54.

In 1873 he helped establish a collective society of fifteen aspiring artists, becoming the “pivotal” figure in holding the group together and encouraging the other members. Impressionism historian John Rewald called Pissarro the “dean of the Impressionist painters", not only because he was the oldest of the group, but also "by virtue of his wisdom and his balanced, kind, and warmhearted personality”. Cézanne said "he was a father for me. A man to consult and a little like the good Lord," and he was also one of Gauguin's masters. Renoir referred to his work as “revolutionary”, through his artistic portrayals of the "common man", as Pissarro insisted on painting individuals in natural settings without "artifice or grandeur".