The Caddoan Mississippian culture was a prehistoric Native American culture considered by archaeologists as a variant of the Mississippian culture. The Caddoan Mississippians covered a large territory, including what is now Eastern Oklahoma, Western Arkansas, Northeast Texas, and Northwest Louisiana. Archaeological evidence that the cultural continuity is unbroken from prehistory to the present; that the direct ancestors of the modern Caddo Nation of Oklahoma included the speakers of the Caddo and related Caddo language in prehistoric times and at first European contact, is unquestioned today.