 The museum documents the culture of a civilization which existed in a 15-acre (60,703 m2) palisaded village on a meander bend of the Mississippi River in the area around 1400–1650 CE.Cultivation of crops, hunting, social life, religion and politics of that ancient civilization are topics of the exhibition.In 1964, the Nodena Site was declared a National Historic Landmark, and was added to the National Register of Historic Places two years later.