Endangered Heritage: Preserving Greater Cahokia May 3, 2016 12:15 pm by ISASarchaeologyIllinois State Archaeological SurveyPrairie Research Institute Share on Facebook Tweet Email On April 29, 2016, Sen. Dick Durbin called upon President Barack Obama to declare Cahokia a National Park. This video outlines why elevating the status of Cahokia to a National Park and preserving Greater Cahokia is so important. Share on Facebook Tweet Email