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Casa Grande Ruins National Monument

Casa Grande Ruins National Monument
IUCN category V (protected landscape/seascape)
CasaGrandeRuin.jpg
Map showing the location of Casa Grande Ruins National Monument
Map showing the location of Casa Grande Ruins National Monument
Location Pinal County, Arizona, USA
Nearest city Coolidge
Coordinates 32°59′49″N 111°31′55″W / 32.9970051°N 111.5320692°W / 32.9970051; -111.5320692Coordinates: 32°59′49″N 111°31′55″W / 32.9970051°N 111.5320692°W / 32.9970051; -111.5320692
Area 472.5 acres (191.2 ha)
Created August 3, 1918 (1918-August-03)
Visitors 65,106 (in 2013)
Governing body National Park Service
Website Casa Grande Ruins National Monument
NRHP Reference # 66000192
Added to NRHP October 15, 1966

Casa Grande Ruins National Monument (O'odham: Siwañ Waʼa Ki: or Sivan Vahki), in Coolidge, Arizona, just northeast of the city of Casa Grande, preserves a group of Ancient Pueblo Peoples Hohokam structures of the Pueblo III and Pueblo IV Eras.

The national monument consists of the ruins of multiple structures surrounded by a compound wall constructed by the ancient people of the Hohokam period, who farmed the Gila Valley in the early 13th century. "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."

"Casa Grande" is Italian and Spanish for "big house" (Siwañ Wa'a Ki: in O'odham); these names refer to the largest structure on the site, which is what remains of a four story structure that may have been abandoned by 1450. The structure is made of caliche, and has managed to survive the extreme weather conditions for about seven centuries. The large house consists of outer rooms surrounding an inner structure. The outer rooms are all three stories high, while the inner structure is four stories high. The structures were constructed using traditional adobe processes. The wet adobe is thicker at the base and adds significant strength. Horizontal cracks can be noticed and this defines the breaks between courses on the thick outer walls. The process consisted of using damp adobe to form the walls and then waiting for it to dry, and then building it up with more adobe. Casa Grande contained a ball court much like that found at Pueblo Grande de Nevada. Father Eusebio Kino was the first European to view the Hohokam complex in November 1694 and named it Casa Grande.Graffiti from 19th-century passers-by is scratched into its walls; though this is now illegal. Casa Grande now has a distinctive modern roof covering built in 1932.


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