Input (grade 8): Additionally, the core collection has major works of art donated by Paul Mellon, Ailsa Mellon Bruce, Lessing J. Rosenwald, Samuel Henry Kress, Rush Harrison Kress, Peter Arrell Brown Widener, Joseph E. Widener and Chester Dale.
Output (grade 4): Andrew W. Mellon gave money and art to help the museum. Many lovers of art have given the National Gallery their art collections, like Lessing J. Rosenwald, Samuel H. Kress, and Joseph E. Widener.