Casa Grande National Monument

Archeologists have discovered evidence that the ancient Sonoran Desert people who built the Casa Grande also developed wide-scale irrigation farming and extensive trade connections which lasted over a thousand years until about 1450 C.E.

The Casa Grande was abandoned around 1450 C.E. Since the ancient Sonoran Desert people who built it left no written language behind, written historic accounts of the Casa Grande begin with the journal entries of Padre Eusebio Francisco Kino when he visited the ruins in 1694. In his description of the large ancient structure before him, he wrote the words "casa grande" (or "great house") which are still used today. More became known about the ruins with the later visits of Lt. Col. Juan Bautista de Anza's expedition in 1775 and Brig. Gen. Stephen Watts Kearny's military detachment in 1846. Subsequent articles written about the Casa Grande increased public interest. During the 1860's through the 1880's more people began to visit the ruins with the arrival of a railroad line twenty miles to the west and a connecting stagecoach route that ran right by the Casa Grande. The resulting damage from souvenir hunting, graffiti and outright vandalism raised serious concerns about the preservation of the Casa Grande.