My mother has made arrangements to have her remains interred in an above-ground mausoleum. Is embalming required(IL)? What happens to her remains a century or two from now when the concrete mausoleum starts crumbling? I am wondering if before my death, or her grandchildren’s death, if we should have her remains eventually interred in the ground in some remote cemetery out in the country where hopefully they will not be touched again. Would this be a good idea if I want to make sure her bones are not just thrown in a trash dump in a few centuries when the mausoleum building deteriorates and must be destroyed?