Oscar-Claude Monet, arguably the founder of Impressionism with his painting
Impression, soleil levant (Impression, sunrise) from which the Impressionist movement took its name.

Impression, Sunrise, 1872

Woman with a Parasol - Madame Monet and Her Son, 1875

La plage de Trouville, (The beach at Trouville) 1870,

Coquelicots, La promenade (Poppies), 1873, Musée d'Orsay, Paris

The Magpie, 1868–1869. Musée d'Orsay, Paris

Waterlilies and Japanese Bridge, 1899. Princeton University Art Museum/Art Resource, NY.

Argenteuil, 1874, National Gallery of Art, Washington D.C.