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SWEDEN - JANUARY 01: Princess ASTRID of Sweden (standing up) and her sister Princess MARGARETHA of Sweden around 1920. Princess ASTRID married King LEOPOLD III of Belgium in 1926. (Photo by Keystone-France/Gamma-Keystone via Getty Images)

SWEDEN - JANUARY 01:  Princess ASTRID of Sweden (standing up) and her sister Princess MARGARETHA of Sweden around 1920. Princess ASTRID married King LEOPOLD III of Belgium in 1926.  (Photo by Keystone-France/Gamma-Keystone via Getty Images)