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SYDNEY, AUSTRALIA - OCTOBER 25: Denmark's Crown Prince Frederik (L) and his Australian wife Crown Princess Mary pose for a photograph as they arrive at the Sydney Opera House on October 25, 2013 in Sydney, Australia. Prince Frederik and Princess Mary are visiting Sydney for five days and will attend events to celebrate the 40th anniversary of the Sydney Opera House and the Danish architect who designed the landmark, Jorn Utzen. (Photo by David Gray - Pool /Getty Images)