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MONACO - APRIL 19: Portrait of Rainier III, Prince of Monaco to Princess Grace on their wedding day on April 19, 1956 in Monaco. (Photo by 3777/Gamma-Rapho via Getty Images)

MONACO - APRIL 19: Portrait of Rainier III, Prince of Monaco to Princess Grace on their wedding day on April 19, 1956 in Monaco. (Photo by 3777/Gamma-Rapho via Getty Images)