Casa Grande, << KAH sah GRAHN day, >> Ruins National Monument is an area in southern Arizona that has the remains of an ancient farming community. It includes the ruins of a four-story casa grande (great house) built by Indians who irrigated and farmed the land in the Gila Valley hundreds of years ago. The adobe building was discovered in 1694. The monument was established in 1892. For its area, see National Park System (table: National monuments) .
