pA work of medieval natural history and philosophy, De Natura Rerum Liber by St Isidorus offers a fascinating glimpse into the scientific and intellectual world of the early medieval period. Drawing from a range of classical sources, including the works of Aristotle and Pliny the Elder, Isidorus provides a comprehensive and detailed account of the natural world, covering such topics as minerals, plants, and animals, as well as the spiritual and metaphysical dimensions of creation.ppThis work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.ppThis work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity individual or corporate has a copyright on the body of the work.ppScholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to t