National Gallery of Art
National Gallery of Art: Childe Hassam, "Allies Day"
This resource includes a picture of the famous painting, "Allies Day," as well as a brief description of the history behind it.
Other
Tfao: American Impressionism to Modernism
This site gives a breif history of art movements from Impressionism to Modernism, concentrating in America. There are also pages linked to key artists within each movement where you can also see their work.
Other
Lyme Art: American Impressionism
This site gives a brief history of the American Impressionists who painted in Lyme, Connecticut.
Google Cultural Institute
Google Cultural Institute: Van Gogh Museum
The Van Gogh Museum in Amsterdam houses the largest collection of artworks by Vincent van Gogh (1853-1890) in the world. The permanent collection includes over 200 paintings by Vincent van Gogh, 500 drawings, and more than 750 letters....
Pennsylvania Historical and Museum Comission
Explore Pa History: Mary Cassatt
A concise biographical sketch that examines the life and contributions of nineteenth century impressionist and Pennsylvania native, Mary Cassatt.