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SOUTH KOREA - NOVEMBER 03: Prince Charles, Prince of Wales and Diana, Princess of Wales at a Presidential banquet at the Blue House in Seoul during their last official trip together in the Republic of Korea (South Korea) (Photo by Tim Graham Photo Library via Getty Images)

SOUTH KOREA - NOVEMBER 03:  Prince Charles, Prince of Wales and Diana, Princess of Wales at a Presidential banquet at the Blue House in Seoul during their last official trip together in the Republic of Korea (South Korea)  (Photo by Tim Graham Photo Library via Getty Images)