Frederick Childe Hassam (Boston, 1859 – East Hampton, Connecticut, 1935) was an American Impressionist painter. In 1886, he went to Paris to study. By suggestion of Celia Thaxter he switch his name from "Frederick C. Hassam" to the more artistic-sounding "F. Childe Hassam".
On his second trip to Europe in 18861887, Hassam had been among the first Americans to embrace French impressionism. With his New Englander's worship of order, however, he consistently subjected his compositions and brushstrokes to a geometric rigor. Hassam even claimed, somewhat dubiously, "I have to de-bunk the idea that I use dots of color, so called, or what is known as Impressionism." 
Hassam was a prolific artist with more than 3,000 works. He liked to paint scenes of New York life and landscapes of New England, most of them at plain air with freshness and a clear luminous atmosphere. His most distinctive and famous works of his later life are a set of paintings known as the "Flag series".