Prince Of Asturias Juan Carlos [Getty Images]

UNSPECIFIED - DECEMBER 29: Prince Juan Carlos at 16 on December 29, 1954. (Photo by Gamma-Keystone via Getty Images) — see more

UNSPECIFIED - DECEMBER 29: Prince Juan Carlos at 16 on December 29, 1954. (Photo by Gamma-Keystone via Getty Images)

Gamma-Keystone Keystone-France