Have you done research on historical precedents for this work? What comes to mind are great works like cathedrals or projects that like the Great Wall of china

Have you done research on historical precedents for this work? What comes to mind are great works like cathedrals or projects that like the Great Wall of china which was on again / off again over millennia centuries. In science fiction there’s very long term projects such as in Dune or Foundation which the authors put a great deal of thought into.