From the record
“Moundville Archaeological Site, also known as the Moundville Archaeological Park, is a Mississippian culture archaeological site on the Black Warrior River in Hale County, near the modern city of Tuscaloosa, Alabama. Extensive archaeological investigation has shown that the site was the political and ceremonial center of a regionally organized Mississippian culture chiefdom polity known as the Province of Pafalaya between the 11th and 16th centuries.”
Wikipedia article Moundville Archaeological Site, CC BY-SA 4.0.
One of 21 National Register listings published here for Hale County · listed in 1966 · category: Site · a National Historic Landmark.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service