🇺🇸 United States · Earthwork
Marietta Earthworks
Middle Woodland Hopewell (100 BCE–500 CE) · Hopewell (Marietta phase)
Hopewell ceremonial complex (100 BCE–500 CE) at confluence of Muskingum and Ohio Rivers, originally three enclosures: Capitolium Square (150×110 m terraced platform and graded way), Quadranaou double…