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FLORENCE, ITALY - APRIL 03: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall visit Sant'Ambrogio Market to celebrate the Slow Food movement and meet local food producers of the Abruzzo region and areas affected by the earthquakes of 2016, on April 3, 2017 in Florence, Italy. Slow Food is a global, grassroots organization, founded in 1989 by Carlo Petrini to prevent the disappearance of local food cultures and traditions and to counteract the rise of the fast food culture. It is an international movement involving millions of people in over 160 countries. (Photo by Chris Jackson/Getty Images)

FLORENCE, ITALY - APRIL 03:  Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall visit Sant'Ambrogio Market to celebrate the Slow Food movement and meet local food producers of the Abruzzo region and areas affected by the earthquakes of 2016, on April 3, 2017 in Florence, Italy. Slow Food is a global, grassroots organization, founded in 1989 by Carlo Petrini to prevent the disappearance of local food cultures and traditions and to counteract the rise of the fast food culture. It is an international movement involving millions of people in over 160 countries.  (Photo by Chris Jackson/Getty Images)

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FLORENCE, ITALY - APRIL 03: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall visit Sant'Ambrogio Market to celebrate the Slow Food movement and meet local food producers of the Abruzzo region and areas affected by the earthquakes of 2016, on April 3, 2017 in Florence, Italy. Slow Food is a global, grassroots organization, founded in 1989 by Carlo Petrini to prevent the disappearance of local food cultures and traditions and to counteract the rise of the fast food culture. It is an international movement involving millions of people in over 160 countries. (Photo by Chris Jackson/Getty Images)

FLORENCE, ITALY - APRIL 03:  Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall visit Sant'Ambrogio Market to celebrate the Slow Food movement and meet local food producers of the Abruzzo region and areas affected by the earthquakes of 2016, on April 3, 2017 in Florence, Italy. Slow Food is a global, grassroots organization, founded in 1989 by Carlo Petrini to prevent the disappearance of local food cultures and traditions and to counteract the rise of the fast food culture. It is an international movement involving millions of people in over 160 countries.  (Photo by Chris Jackson/Getty Images)

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FLORENCE, ITALY - APRIL 03: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall visit Sant'Ambrogio Market to celebrate the Slow Food movement and meet local food producers of the Abruzzo region and areas affected by the earthquakes of 2016, on April 3, 2017 in Florence, Italy. Slow Food is a global, grassroots organization, founded in 1989 by Carlo Petrini to prevent the disappearance of local food cultures and traditions and to counteract the rise of the fast food culture. It is an international movement involving millions of people in over 160 countries. (Photo by Chris Jackson/Getty Images)

FLORENCE, ITALY - APRIL 03:  Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall visit Sant'Ambrogio Market to celebrate the Slow Food movement and meet local food producers of the Abruzzo region and areas affected by the earthquakes of 2016, on April 3, 2017 in Florence, Italy. Slow Food is a global, grassroots organization, founded in 1989 by Carlo Petrini to prevent the disappearance of local food cultures and traditions and to counteract the rise of the fast food culture. It is an international movement involving millions of people in over 160 countries.  (Photo by Chris Jackson/Getty Images)

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FLORENCE, ITALY - APRIL 03: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall attend an event for the Italian Wool Industry and the Prince of Wales's Campaign for Wool at Palazzo Pitti, on April 3, 2017 in Florence, Italy. Their Royal Highnesses will be introduced to representatives from Woolmark and the Campaign for Wool, view product demonstrations, learn about innovative wool techniques and be given a tour of the palace's Art Gallery. The Prince of Wales launched the Campaign for Wool in January 2010 as an initiative to expand the market for British and Commonwealth wool and promote awareness of its environmental benefits. (Photo by Chris Jackson/Getty Images)

FLORENCE, ITALY - APRIL 03:  Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall attend an event for the Italian Wool Industry and the Prince of Wales's Campaign for Wool at Palazzo Pitti, on April 3, 2017 in Florence, Italy. Their Royal Highnesses will be introduced to representatives from Woolmark and the Campaign for Wool, view product demonstrations, learn about innovative wool techniques and be given a tour of the palace's Art Gallery. The Prince of Wales launched the Campaign for Wool in January 2010 as an initiative to expand the market for British and Commonwealth wool and promote awareness of its environmental benefits.  (Photo by Chris Jackson/Getty Images)

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FLORENCE, ITALY - APRIL 03: Camilla, Duchess of Cornwall starts her day with a coffee at a market shop to celebrate the Slow Food movement during day 4 of their visit to Italy, on April 3, 2017 in Florence, Italy. (Photo by Arthur Edwards - WPA Pool/Getty Images)

FLORENCE, ITALY - APRIL 03:   Camilla, Duchess of Cornwall starts her day with a coffee at a market shop to celebrate the Slow Food movement during day 4 of their visit to Italy, on April 3, 2017 in Florence, Italy.  (Photo by Arthur Edwards - WPA Pool/Getty Images)