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BELGRADE, SERBIA - MARCH 16: (2ndL-R) Hereditary Prince Peter Karadjordjevic, Katherine Karadjordjevic, Crown Princess of Yugoslavia, Prince Charles, Prince of Wales and Alexander Karadjordjevic, Crown Prince of Yugoslavia meet during the first day of a two day visit to Serbia on March 16, 2016 in Belgrade, Serbia. (Photo by Srdjan Stevanovic/Getty Images)