On June 30, 1984, an historic concert took place in the Tonhalle, the famous concert hall of Dusseldorf, West Germany. The event was the culmination of three years of work by artists os 19 nacionalities. The star of the concert was Sarah Vaughan, one of the truly great singers of the Twentieth Century. She sang a cycle of songs based on poems written years earlier by a young Polish priest named Karol Wojtyla, who woud become the first non-italian Pope in four centuries and take the name John Paul II.