Princess Irene of the Netherlands and Carlos Hugo, Duke of Parma (1930-2010) leave the Basilica di Santa Maria Maggiore in Rome after their wedding ceremony on 29th April 1964. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)
Princess Irene of the Netherlands and Carlos Hugo, Duke of Parma (1930-2010) leave the Basilica di Santa Maria Maggiore in Rome after their wedding ceremony on 29th April 1964. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)