BELGRADE, SERBIA - MAY 18: The Queen Marie of Yugoslavia and her three son: Prince Peter, Prince Tomislav and Prince Andre on May 18, 1931 in Belgrade, Serbia. (Photo by Keystone-France/Gamma-Keystine via Getty Images)
BELGRADE, SERBIA - MAY 18: The Queen Marie of Yugoslavia and her three son: Prince Peter, Prince Tomislav and Prince Andre on May 18, 1931 in Belgrade, Serbia. (Photo by Keystone-France/Gamma-Keystine via Getty Images)