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The Metropolitan Museum of Art, New York: metmuseum.org
Barns Museum- Philadelphia https://www.barnesfoundation.org
MoMA | The Museum of Modern Art
The Hunterdon Art Museum, Clinton, NJ
National Gallery of Art https://www.nga.gov/index.html
National Gallery of Art, Educational Resourse https://www.nga.gov/education/digital-education-resources.html