UNSPECIFIED - DECEMBER 10: In this handout provided by Clarence House on December 10, 2016, shows The Prince of Wales and Duchess of Cornwall's 2016 Christmas card on a Christmas tree in Clarence House, London. The picture on the card was taken by Chris Jackson of Getty Images, showing the royal couple during their tour of Croatia where they met local performers wearing traditional dress in Tvrda, the old town of the city of Osijek. (Photo by Getty Images via Clarence House)

This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder.')
UNSPECIFIED - DECEMBER 10: In this handout provided by Clarence House on December 10, 2016, shows the front of the Prince of Wales and Duchess of Cornwall's 2016 Christmas card on a Christmas tree in Clarence House, London. The picture on the card was taken by Chris Jackson of Getty Images, showing the royal couple during their tour of Croatia where they met local performers wearing traditional dress in Tvrda, the old town of the city of Osijek. (Photo by Getty Images via Clarence House)

This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder.')
UNSPECIFIED - DECEMBER 10: In this handout provided by Clarence House on December 10, 2016, shows The Prince of Wales and Duchess of Cornwall's 2016 Christmas card on a Christmas tree in Clarence House, London. The picture on the card was taken by Chris Jackson of Getty Images, showing the royal couple during their tour of Croatia where they met local performers wearing traditional dress in Tvrda, the old town of the city of Osijek. (Photo by Getty Images via Clarence House)

This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder.')