The Prince Of Wales And The Duchess Of Cornwall At The Vatican For A Meeting With Pope Benedict Xvi. (Photo by Mark Cuthbert/UK Press via Getty Images)
VENICE - APRIL 28:  Camilla, Duchess of Cornwall and Prince Charles, Prince of Wales talk to a gondolier as they make their way to the Opera House on April 28, 2009 in Venice, Italy. The Prince of Wales and The Duchess of Cornwall are in Italy as part of official visits to Italy, The Holy See and the Federal Republic of Germany for four days. Their Royal Highnesses´┐Ż visit to Italy will focus on the key issue of climate change whilst the visit to Germany will focus on the themes of global sustainability, social inclusion and long-term Anglo-German partnership and co-operation.  (Photo by Chris Jackson/Getty Images)
VIENNA, AUSTRIA - APRIL 16:  Charles (R) and Diana, Princess of Wales, attend a state reception during their official visit to Austria on April 16, 1986.  (Photo by Georges De Keerle/Getty Images)