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Former First Lady of the United States, Jacqueline Kennedy (1929-1994) pictured with left, Aline Griffith, Countess of Romanones and right, Cayetana Fitz-James Stuart, Duchess of Alba at a bullfight in Seville, Spain in April 1966. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)

Former First Lady of the United States, Jacqueline Kennedy (1929-1994) pictured with left, Aline Griffith, Countess of Romanones and right, Cayetana Fitz-James Stuart, Duchess of Alba at a bullfight in Seville, Spain in April 1966. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)