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PORTUGAL - APRIL 14: Prince Albert of Monaco with his mother Princess Grace of Monaco on April 14, 1964 in Portugal. (Photo by REPORTERS ASSOCIES/Gamma-Keystone via Getty Images)

PORTUGAL - APRIL 14:  Prince Albert of Monaco with his mother Princess Grace of Monaco on April 14, 1964 in Portugal. (Photo by REPORTERS ASSOCIES/Gamma-Keystone via Getty Images)