Regional Decline of Mississippian Culture

Timeline

1. 1271–1280Cahokia site · IllinoisCahokia, the largest pre-Columbian city in North America, experienced a sharp population decline in the mid-to-late 13th century; new construction in the platform temple precinct ceased and the settlement core dispersed outward; archaeological strata show markedly reduced residential density, marking the end of the highest Mississippian ceremonial center.
2. 1271–1280Mississippian culture area of the southeastern United States · SoutheastChiefdom settlement networks from the Mississippi River Valley to the Southeast showed simultaneous signs of decline: ceremonial mound construction halted, trade pottery circulation decreased, and some sites were abandoned. Paleoclimate tree-ring and lake sediment records indicate worsening drought at the end of the 13th century, which may have exacerbated the collapse of agricultural systems and socio-political reorganization.