Shahn also began to act as a commercial artist for CBS, "Time", "Fortune" and "Harper's". His portrait of Martin Luther King Jr. appeared on the 19 March 1965 cover of "Time". Despite Shahn's growing popularity, he only accepted commissions which he felt were of personal or social value. By the mid-1950s, Shahn's accomplishments had reached such a height that he was sent, along with Willem de Kooning, to represent the United States at the 1954 Venice Biennale. He was also elected to the American Academy of Arts and Sciences, the National Institute of Arts and Letters and the Academia dell' Arte e del Disegno in Florence. The Art Directors Club Hall of Fame recognizes him as "one of the greatest masters of the twentieth century. Honors, books, and gallery retrospectives continue to rekindle interest in his work...years after his death."