Cahokia, according to BBC, was a Native American city near present day St. Louis. It reached its peak of about 30,000 people around 1,000 A.D., which may not sound impressive but was a larger city than Paris at the time. One interesting thing the article mentions is that there is no evidence of a market economy found, but instead the city appears to have been a “cultural center” renowned for feasts, parties, and…graveyards.