Growth of Cahokia Mound City

Timeline

1. 900–950Cahokia · IllinoisThe Cahokia settlement on the Mississippi grew rapidly in population, with agricultural surplus supporting large-scale labor organization. The settlement developed from scattered villages into a concentrated mound city, becoming the largest prehistoric urban center in eastern North America.
2. 950–1000Monks Mound · IllinoisMonks Mound was built up in stages, becoming the city's religious and political core. A chief's residence and temple may have stood atop the mound; its scale and orientation reflect precise astronomical knowledge and centralized mobilization capacity, making it Cahokia's symbol of power.
3. 920–1000Grand Plaza · IllinoisCahokia's central Grand Plaza and timber-fenced enclosure formed a space for ceremonial activities; remains such as the woodhenge circle indicate complex astronomical rituals. Shells, copper objects, and goods from distant lands converged here, showing the city was a hub of extensive trade and tribute networks.