13th April 1959: Prince Albert of Belgium, brother of King Baudouin, with his bride-to-be Princess Paola Ruffo di Calabria in Brussels. He succeeded his brother to the throne in 1993. (Photo by Keystone/Getty Images)
BELGIUM - JULY 02: The official wedding photo of Prince ALBERT of Belgium and DONNA PAOLA, in Brussels on July 2, 1959. From left to right : Princess LILIANE, Prince ALBERT, Princess PAOLA and her mother Princess LUISA RUFFO, King LEOPOLD and in front of him, Princess MARIE-CHRISTINE. (Photo by Keystone-France/Gamma-Keystone via Getty Images)
Prince Albert and Princess Paola of Belgium with their son Prince Philippe (born on 15 April 1960) in 1961. (Photo by Keystone/Getty Images)
Prince Albert of Belgium, later King Albert II of Belgium and Princess Paola of Belgium (later Queen Paola of Belgium) with their children Princess Astrid of Belgium and Prince Philippe of Belgium (right), enjoying a family holiday on the beach at Forte dei Marmi, Italy,16th August 1964. (Photo by Keystone/Hulton Archive/Getty Images)
BRUSSELS, BELGIUM - APRIL 09: The Belgian royal family (from left to right: Princess Astrid, Princess Paola, Prince Laurent, Prince Philippe, Prince Albert of Belgium) on a bench in the park of the Belvedere castle on April 9, 1965 in Brussels , Belgium. (Photo by Keystone-France/Gamma-Keystine via Getty Images)
