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The Great Mosque of Djenné, Mali
This sun dried earth-brick and plaster structure has survived for centuries, against all the odds. It was originally built in the 1200s and has since enjoyed only a single touch of remodeling (done in the early 90s). Still, the people of Mali are proud of it that it appears in the nation’s court of arms. And to keep their treasure alive forever, the Djenne community hosts an annual festival to fix any cracks or damages.