Photo taken on Dec. 31, 2014 shows the view of the city of Gao from the Tomb of Askia, in Gao, northern Mali. Built in the late fifteenth century, Askia is believed to be the burial place of Askia Mohammad I, one of the Songhai Empire's most prolific emperors. It is designated as a UNESCO World Heritage Site in 2004. (Xinhua/Li Jing)
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