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DENMARK - JULY 31: On July 31, 1954, the royal family of the Netherlands and that of Denmark's pose before the castle of Graasten, in Denmark, where both families are spending their vacation. In the first row, from left to right: Princess MARGRIET of Holland, Princess' BENEDIKTE and ANNE-MARIE of Denmark, Princess CHRISTINA and IRENE of Holland and Princess MARGRETHE of Denmark. Second row: Patricia RAMSAY, aunt of Queen INGRID, Queen INGRID of Denmark, Queen JULIANA of the Netherlands, Princess BEATRIX, King FREDERIK IX of Denmark and Prince BERNHARD of the Netherlands. (Photo by Keystone-France/Gamma-Keystone via Getty Images)

DENMARK - JULY 31:  On July 31, 1954, the royal family of the Netherlands and that of Denmark's pose before the castle of Graasten, in Denmark, where both families are spending their vacation. In the first row, from left to right: Princess MARGRIET of Holland, Princess' BENEDIKTE and ANNE-MARIE of Denmark, Princess CHRISTINA and IRENE of Holland and Princess MARGRETHE of Denmark. Second row: Patricia RAMSAY, aunt of Queen INGRID, Queen INGRID of Denmark, Queen JULIANA of the Netherlands, Princess BEATRIX, King FREDERIK IX of Denmark and Prince BERNHARD of the Netherlands.  (Photo by Keystone-France/Gamma-Keystone via Getty Images)