In the obituary that appeared soon after his death, Johann Sebastian Bach was described as "the world-famous organist" and "the greatest organist...we have ever had." In Hamburg, Dresden, and other big cities, Bach dazzled audiences with his organ playing, performing passages with his feet that many thought impossible for the hands. One eyewitness declared that he had never seen anything like it. His extant organ works--more than 250 chorale settings...