SAUDI ARABIA - NOVEMBER 17: Princess Diana, Princess of Wales, wearing a black and white evening dress designed by the Emmanuels, attends a dinner given by the Crown Prince in Saudi Arabia on November 17, 1986. (Photo by Anwar Hussein/Getty Images)

SAUDI ARABIA - NOVEMBER 17: Princess Diana, Princess of Wales, wearing a black and white evening dress designed by the Emmanuels, attends a dinner given by the Crown Prince in Saudi Arabia on November 17, 1986.  (Photo by Anwar Hussein/Getty Images)