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Hopewell culture, notable ancient Indian culture of the east-central area of North America. It flourished from about 200 bce to 500 ce chiefly in what is now southern Ohio, with related groups in Michigan, Wisconsin, Indiana, Illinois, Iowa, Kansas, Pennsylvania, and New York. The name is derived from the Hopewell farm in Ross county, Ohio, where the first site—centring on a group of burial mounds with extensive enclosures of banked earth—was explored. The term Mound...