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Great Mosque of Djenne
https://www.khanacademy.org/humanities/art-africa/west-africa/mali1/a/great-mosque-of-djenne
http://www.sacred-destinations.com/mali/great-mosque-of-djenne
http://www.greatmosqueofdjenne.com/
http://www.pbs.org/wonders/Episodes/Epi5/5_wondr2.htm
