requesting the State Conservation Commission to purchase Aztalan. 120 acres (490,000 m2) were purchased to this end in 1948, and the Wisconsin Archeological Society and the Lake Mills-Aztalan Historical Society donated their holdings. Aztalan opened to the public in 1952 as Aztalan State Park. Aztalan was designated a registered National Historic Landmark in 1964 and added to the National Register of Historic Places in 1966. In 1968, the state reconstructed portions of the stockade wall by placing new posts in the original holes. A section of this was also covered with the wattle and daub, but this has since worn away or been removed. See also List of National Historic Landmarks in Wisconsin National Register of Historic Places listings in Jefferson County, Wisconsin Rock Lake, Wisconsin References Further reading External links Aztalan State Park, Wisconsin Department of Natural Resources Aztalan site history, Milwaukee Public Museum Middle Mississippian culture Archaeological sites on the National Register of Historic Places in Wisconsin National Historic Landmarks in Wisconsin State parks of Wisconsin Protected areas of Jefferson County, Wisconsin Protected areas established in 1947 1947 establishments in Wisconsin 900s establishments National Register of Historic Places in Jefferson County, Wisconsin 10th-century establishments in North America