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FLORENCE, ITALY - MARCH 31: Camilla, Duchess of Cornwall meets Italian children who are learning English at the British Institute in Florence on March 31, 2017 in Florence, Italy. (Arthur Edwards - WPA Pool /Getty Images)

FLORENCE, ITALY - MARCH 31:  Camilla, Duchess of Cornwall meets Italian children who are learning English at the British Institute in Florence on March 31, 2017 in Florence, Italy.   (Arthur Edwards - WPA Pool /Getty Images)

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Prince Charles (C), Prince of Wales and the Duchess of Cornwall, Camilla, are welcomed by the mayor of Florence Dario Nardella (L) as they arrive on March 31, 2017 for a six-day visit in Italy and Vatican. According to Clarence House, the tour will highlight UK's relationship with European partners in areas including social cohesion, military ties and combatting human trafficking. / AFP PHOTO / Alberto PIZZOLI (Photo credit should read ALBERTO PIZZOLI/AFP/Getty Images)

Prince Charles (C), Prince of Wales and the Duchess of Cornwall, Camilla, are welcomed by the mayor of Florence Dario Nardella (L) as they arrive on March 31, 2017 for a six-day visit in Italy and Vatican. According to Clarence House, the tour will highlight UK's relationship with European partners in areas including social cohesion, military ties and combatting human trafficking. / AFP PHOTO / Alberto PIZZOLI        (Photo credit should read ALBERTO PIZZOLI/AFP/Getty Images)

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Prince Charles, Prince of Wales and the Duchess of Cornwall, Camilla, walk in Florence on March 31, 2017 as part of a six-day visit in Italy and Vatican. According to Clarence House, the tour will highlight UK's relationship with European partners in areas including social cohesion, military ties and combatting human trafficking. / AFP PHOTO / Alberto PIZZOLI (Photo credit should read ALBERTO PIZZOLI/AFP/Getty Images)

Prince Charles, Prince of Wales and the Duchess of Cornwall, Camilla, walk in Florence on March 31, 2017 as part of a six-day visit in Italy and Vatican. According to Clarence House, the tour will highlight UK's relationship with European partners in areas including social cohesion, military ties and combatting human trafficking. / AFP PHOTO / Alberto PIZZOLI        (Photo credit should read ALBERTO PIZZOLI/AFP/Getty Images)

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FLORENCE, ITALY - MARCH 31: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall taking a walk at Santa Trinita Bridge on March 31, 2017 in Florence, Italy. The royal couple are in Italy for a five days visit during which they will Meet Pope Francis at the Vatican, and Prince Charles will visit Amatrice, the town devastated by a 6.0 magnitude earthquake and where 297 people died last summer. (Photo by Alessandra Benedetti - Corbis/Corbis via Getty Images)

FLORENCE, ITALY - MARCH 31: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall taking a walk at Santa Trinita Bridge on March 31, 2017 in Florence, Italy. The royal couple are in Italy for a five days visit during which they will Meet Pope Francis at the Vatican, and Prince Charles will visit Amatrice, the town devastated by a 6.0 magnitude earthquake  and where 297 people died last summer. (Photo by Alessandra Benedetti - Corbis/Corbis via Getty Images)