The lost metropolis that reshaped North America’s past.

For centuries, fields across the American Bottom hid a metropolis. Near today’s Collinsville, Illinois, earthen mounds once anchored Cahokia, the largest city north of Mesoamerica. At its height around 1050 CE, tens of thousands lived along the Mississippi’s floodplain, trading copper, shell, and ideas. New analyses sharpen dates, scale, and organization, revealing a planned urban center that rivaled medieval capitals while leaving no written record behind. Archaeology now reconstructs daily life, governance, and environmental pressures with surprising clarity today still.



