The story of Djenné, Mali, is typically told through its architecture—monumental mud-brick structures that seem to rise out of the earth like a desert mirage. Every building in Djenné’s historic sector, designated a UNESCO World Heritage site in 1988, has been molded and reinforced by generations of mud masons, following an indigenous tradition as old as the city itself. When Natural History Museum curator Mary Jo Arnoldi traveled to Djenné in 2010, she wanted to meet the masons behind the city of mud, to give them a chance to “tell this story in their own words.”

Read More: How the City of Mud Stays Standing: Meet the Masons of Djenne, Mali