BELGRADE, SERBIA - MARCH 16: Prince Charles, Prince of Wales arrives for meets with Alexander Karadjordjevic, Crown Prince of Yugoslavia on the first day of a two day visit to Serbia on March 16, 2016 in Belgrade, Serbia. (Photo by Srdjan Stevanovic/Getty Images)

BELGRADE, SERBIA - MARCH 16:  Prince Charles, Prince of Wales arrives for meets with Alexander Karadjordjevic, Crown Prince of Yugoslavia on the first day of a two day visit to Serbia on March 16, 2016 in Belgrade, Serbia. (Photo by Srdjan Stevanovic/Getty Images)