Fort Ancient
Fort Ancient is a name for a Native American culture that flourished from c. 1000–1750 CE and predominantly inhabited land near the Ohio River valley in the areas of modern-day southern Ohio, northern Kentucky, southeastern Indiana and western West Virginia. Although a contemporary of the Mississippian culture, they are often considered a "sister culture" and distinguished from the Mississippian culture. While far from agreed upon, there is evidence to suggest that the Fort Ancient Culture were not the direct descendants of the Hopewellian Culture. It is suspected that the Fort Ancient Culture introduced maize agriculture to Ohio. The Fort Ancient Culture were most likely the builders of the Great Serpent Mound. Recent archeological study and carbon dating suggests that Alligator Mound in Granville also dates to the Fort Ancient era, rather than the assumed Hopewell era. It is believed that neither the Serpent or Alligator Mounds are burial locations, but rather served as ceremonial effigy sites.