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A picture taken on October 15, 2016 shows a marble sundial in the courtyard of the Great Mosque in the small town of Testour, located in the north of Tunisia in the Beja province. / AFP / FETHI BELAID (Photo credit should read FETHI BELAID/AFP/Getty Images)

A picture taken on October 15, 2016 shows a marble sundial in the courtyard of the Great Mosque in the small town of Testour, located in the north of Tunisia in the Beja province. / AFP / FETHI BELAID        (Photo credit should read FETHI BELAID/AFP/Getty Images)