see more

ROME, ITALY - APRIL 29: Wedding of Princess Irene and Prince Carlos Hugo, duke of Parma on April 29, 1964 in Rome, Italy. (Photo by Keystone-France/Gamma-Keystine via Getty Images)

ROME, ITALY - APRIL 29: Wedding of Princess Irene and Prince Carlos Hugo, duke of Parma on April 29, 1964 in Rome, Italy. (Photo by Keystone-France/Gamma-Keystine via Getty Images)