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9th April 1953: The bride and groom Princess Josephine-Charlotte of Belgium and Prince Jean of Luxembourg walking down the aisle of Luxembourg's 13th century cathedral after their marriage ceremony. They became the Grand Duke and Duchess of Luxembourg in 1964. Original Publication: Picture Post - 6495 - Wedding In Luxembourg - pub. 1953 (Photo by Kurt Hutton/Keystone/Getty Images)

9th April 1953:  The bride and groom Princess Josephine-Charlotte of Belgium and Prince Jean of Luxembourg walking down the aisle of Luxembourg's 13th century cathedral after their marriage ceremony. They became the Grand Duke and Duchess of Luxembourg in 1964. Original Publication: Picture Post - 6495 - Wedding In Luxembourg - pub. 1953  (Photo by Kurt Hutton/Keystone/Getty Images)

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25th April 1953: Prince Jean, heir to the throne of Luxembourg, and his wife Princess Josephine Charlotte of Belgium leaving the cathedral after their wedding. Original Publication: Picture Post - 6495 - Wedding In Luxemburg - pub. 1953 (Photo by Kurt Hutton/Picture Post/Getty Images)

25th April 1953:  Prince Jean, heir to the throne of Luxembourg, and his wife Princess Josephine Charlotte of Belgium leaving the cathedral after their wedding. Original Publication: Picture Post - 6495 - Wedding In Luxemburg - pub. 1953  (Photo by Kurt Hutton/Picture Post/Getty Images)

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6th May 1960: Princess Margaret (1930 - 2002) and her husband Antony Armstrong-Jones walking down the aisle at Westminster Abbey after their marriage ceremony. (Photo by Fox Photos/Getty Images)

6th May 1960:  Princess Margaret (1930 - 2002) and her husband Antony Armstrong-Jones walking down the aisle at Westminster Abbey after their marriage ceremony.  (Photo by Fox Photos/Getty Images)