One hundred seven years ago this week, on 8 December 1906, President Theodore Roosevelt designated two archaeological sites as National Monuments.  Montezuma Castle in Arizona and El Morro in New Mexico were among the first properties set aside for special preservation by Roosevelt using the authority given to the president by Section 2 of the then-new Antiquities Act.  During his second term as president, Roosevelt would designate 18 National Monuments, encompassing over 1.5 million acres.  Among the other properties he proclaimed as Monuments are the Grand Canyon (Arizona), Muir Woods (California), Olympic (Washington), Lassen Peak (California), Tonto (Arizona), Natural Bridges (Utah), and Tumacacori (Arizona).

Interested individuals can learn more about the Antiquities Act, how this important national law has been used by Roosevelt and subsequent US presidents to preserve important cultural and natural resources and its importance to the historical development of archaeology from information available in a tDAR collection on these topics.