Prehistoric Caddo culture developed as a regional variant of the Mississippian tradition in southwest Arkansas and in parts of Louisiana, Oklahoma, and Texas between AD 800 and 1100. The characteristics that archaeologists use to identify this prehistoric culture include pottery containers with new shapes and decorations, flat-topped mounds used as platforms for buildings, conical mounds erected over dismantled buildings that occasionally were used as burial sites, new burial practices, new settlement practices, and new subsistence practices. Parallels between some of these features and European descriptions of the historic Caddo who lived in the same large region in the 1600s and 1700s indicate that the prehistoric Caddo were ancestors of the modern Caddo Nation.
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