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Princess Beatrix of the Netherlands and her fiance Claus von Amsberg (1926-2002) pictured together on vacation at their holiday villa in Porto Ercole, Italy in July 1965. (Photo by Rolls Press/Popperfoto/Getty Images)

Princess Beatrix of the Netherlands and her fiance Claus von Amsberg (1926-2002) pictured together on vacation at their holiday villa in Porto Ercole, Italy in July 1965. (Photo by Rolls Press/Popperfoto/Getty Images)