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Singer Marian Anderson (1897-1993) sings to a crowd from the steps of the Lincoln Memorial in Washington DC, on April 9, 1939. The concert came about due to Anderson being barred from performing at Constitution Hall, owned by the Daughters of the American Revolution (DAR). First Lady Eleanor Roosevelt resigned from the DAR in protest and supported the National Association for the Advancement of Colored People (NAACP) as it organised an Easter Sunday concert on the grounds of the Lincoln Memorial. More than 75,000 Americans turned out, one of the largest crowds ever to gather on the Mall on that time. (Photo by Pictorial Parade/Archive Photos/Getty Images)