English: Artists conception of the Caddoan Mississippian culture Spiro Mounds Site in eastern Oklahoma on the Arkansas River. Occupied between 800 to 1450 CE, the site was a major regional power. The illustration shows the large Brown Mound at the center of the site next to the oval shaped the plaza to the west ringed by smaller house mounds. To the southeast is the famous Craigs Mound, or "The Great Mortuary Mound", with its distinctive profile.
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Artists conception of the Caddoan Mississippian culture Spiro Mounds Site in eastern Oklahoma on the Arkansas River. Occupied between 800 to 1450 CE, the site was a major regional power. The illustration shows the large Brown Mound at the center of the site next to the oval shaped the plaza to the west ringed by smaller housea mounds. To the southeast is the famous Craigs Mound, or "The Great Mortuary Mound", with its distinctive profile.