On one occasion, on 10 May 1933, in many German cities, university students and Sturmabteilungen tossed books writ by Jews onto a pile before setting it on fire. Among the books and literature burned was the work of Heinrich Heine, a German poet born to a Jewish family that later converted to Lutheranism. One hundred years earlier, Heine warned "Where one burns books, one will, in the end, burn people." It took only eight more years for the Nazis to fulfill Heine's prophecy.