Casa Grande Ruins National Monument protects the remains of a Hohokam village compound dating primarily to the A.D. 1300s. Casa Grande was the first prehistoric ruin to be protected by the United States government, and was set aside in 1892 by President Benjamin Harrison.
The American Southwest Virtual Museum hosts historic photographs and architectural maps for Casa Grande National Monument.
Additional information about Casa Grande Ruins National Monument is available at the official National Park Service website for Casa Grande Ruins (link opens in new window).