Who's Who on Artists of American Negro Artists Exhibit, by Unknown, May, 1929, Smithsonian Archives - History Div, A list of who's who of the artists featured in the American Negro Artists exhibit that opened on the ground floor of the U.S. National Museum Building on May 16, 1929. A traveling exhibition, the artwork was on display in Washington, DC, for twelve days. These artists, including Archibald Motley, Palmer Hayden, and Hale Woodruff, represented African American achievement and were the first representations of black life and culture that were partially controlled by African Americans themselves..