A tourist visits Saint Catherine's Monastery in South Sinai, Egypt, Jan. 16, 2016. The monastery is one of the oldest working Christian monasteries in the world and also a UNESCO World Heritage Site. (Photo: Xinhua/Ahmed Gomaa)
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A tourist visits Saint Catherine's Monastery in South Sinai, Egypt, Jan. 16, 2016. The monastery is one of the oldest working Christian monasteries in the world and also a UNESCO World Heritage Site. (Photo: Xinhua/Ahmed Gomaa)
