Keywords: Nashville I style gorget Castalian Springs Mound Site drawing.png Mississippian culture Nashville I style shell gorget with a triskele design found by William Myer at the Castalian Springs Mound Site in Sumner County Tennessee and now part of the collection of the National Museum of the American Indian <ref> cite web http //www nmai si edu/searchcollections/item aspx irn 162137 catids 2 catnum 15/856 src 1-5 National Museum of the American Indian Catalog number 15/856 Shell gorget </ref> cite book The Antiquities of Tennessee Gates P Thruston 2 1897 Cincinnati The Robert Clarke Company 1890 1897 ancient North American Public domain in the United States reflist PD-old Nashville style shell gorgets |