<Tr> <Th> NRHP reference #</Th> <Td> 14000140 </Td> </Tr> <Tr> <Th> Added to NRHP </Th> <Td> April 11, 2014 </Td> </Tr> <P> Indian Mounds Regional Park is a public park in Saint Paul, Minnesota, United States, featuring six prehistoric Native American burial mounds overlooking the Mississippi River . The oldest mounds were constructed 1,500--2,000 years ago by people of the Hopewell tradition . Later the Dakota people interred their dead there as well . At least 31 more mounds were destroyed by development in the late 19th century . They were the tallest Native American mounds in Minnesota or Wisconsin (except for the unique 45 - foot (14 m) Grand Mound outside International Falls, Minnesota), and comprise one of the northwesternmost Hopewellian sites in North America . Indian Mounds Regional Park is a component of the Mississippi National River and Recreation Area, a unit of the National Park System . The Mounds Group is listed on the National Register of Historic Places . The 2014 nomination document provides a description of the archaeology and the context . </P> <P> There were once at least 18 mounds, plus another 19 a short distance to the northwest directly above Carver's Cave . The mounds of the second group were all quite small, under 2 feet (0.6 m) high . Anthropologists ascribe the oldest mounds to mound builders of the Hopewell Tradition, but later cultures also added to the mounds . No evidence of habitation has been found among the mounds, so the builders lived elsewhere nearby, probably in a village below the bluff . </P>

Who built most of the mounds in mounds park