Marian Anderson, contralto, was denied the right to perform at Constitution Hall by the DAR because of her color. Instead, and at the urging of Eleanor Roosevelt, Harold Ickes permitted her to perform at the Lincoln Memorial on April 9, 1939.
The message of Marian Anderson’s Lincoln Memorial concert~
Remembering Marian Anderson~ http://www.pbs.org/newshour/bb/remember-jan-june97-anderson_02-26/
Marian Anderson: A Life in Song~ http://www.library.upenn.edu/exhibits/rbm/anderson/