Graffiti decorates the wall of an old house in the Tunisian island of Djerba on July 29, 2014. More than 100 artists from 40 countries were invited by France-based Tunisian artist Mehdi Ben Cheikh to take part in an initiative to turn Djerba's Erriadh district into an “open sky museum”. (Photo by F. Nasri/AFP Photo)
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