Iconic Van Gogh ~ 'Starry Night' (1889) depicts the view outside Van gogh's sanitorium room window at Saint-Rémy-de-Provence, at night. Made even more famous by singer, Don McLean's 1971 song, 'Vincent' (Starry, Starry Night). I've seen the original ~ these stars throb with energy!
Claude Monet "Water Lilies" (Metropolitan Museum of Art, New York) Monet painted a series of 250 water lily paintings in museums all over the world.
'Farbige Karos' (Colored squares) by August Macke, 1913 - This was from period when he was under the influence of Delauney.