Cahokia Mounds / kəˈhoʊkiə / (11 MS 2) [2] is the site of a pre-Columbian Native American city (which existed c. 1050–1350 CE) [3] directly across the Mississippi River from present-day St. Louis. The state archaeology park lies in south-western Illinois between East St. Louis and Collinsville. [4] . More @Wikipedia
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