Britain's Prince Charles and his wife Camilla, Duchess of Cornwall, visit a rehearsal of the Vienna Philharmonic Orchestra on April 6, 2017, in Vienna, Austria. / AFP PHOTO / APA / HANS PUNZ / Austria OUT (Photo credit should read HANS PUNZ/AFP/Getty Images)
Britain's Prince Charles and his wife Camilla, Duchess of Cornwall, visit a rehearsal of the Vienna Philharmonic Orchestra on April 6,2017, in Vienna, Austria. / AFP PHOTO / APA / HANS PUNZ / Austria OUT (Photo credit should read HANS PUNZ/AFP/Getty Images)
VIENNA, AUSTRIA - APRIL 06: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall visit the Musikverein, home of the 175 year old Vienna Philharmonic Orchestra where they are shown artefacts and manuscripts on April 6, 2017 in Vienna, Austria. (Photo by Chris Jackson - Pool/Getty Images)
VIENNA, AUSTRIA - APRIL 06: Camilla, Duchess of Cornwall waves to wellwishers after a visit to the Musikverein, home of the 175 year old Vienna Philharmonic Orchestra on April 6, 2017 in Vienna, Austria. Their Royal Highnesses will observe a rehearsal of the Vienna Philharmonic Orchestra, with student participants of the Amadeus Project, and meet the conductor and musicians. (Photo by Chris Jackson - Pool/Getty Images)
Britain's Camilla, Duchess of Cornwall, talks with a holocaust survivor during a visit of the Jewish Museum on April 6, 2017, in Vienna, Austria. / AFP PHOTO / APA / HANS KLAUS TECHT / Austria OUT (Photo credit should read HANS KLAUS TECHT/AFP/Getty Images)
