Allies Day, 1917 by Childe Hassam

 Frederick Childe Hassam (October 17, 1859 – August 27, 1935) was a prolific American Impressionist painter, noted for his urban and coastal scenes. Along with Mary Cassatt and John Henry Twachtman, Hassam was instrumental in promulgating Impressionism to American collectors, dealers, and museums. He produced over 3,000 paintings, watercolors, etchings, and lithographs over the course of his career, and was a founding member of The Ten, an influential group of American artists of the early 20th century.