The Great House is the archeological centerpiece of the Casa Grande Ruins National Monument. The structure was built by the Hohokam people during the Great Pueblo Period (1150 – 1350) and abandoned about 1450 AD. The purpose of Casa Grande (meaning Big House in Spanish) is unknown. The four-story structure was constructed from caliche. This is a form of rock that can be used like cement. It is a very rare treat in the United States to explore ruins from such an ancient civilization.
