Hildegard of Bingen, Abbess of convents at Rupertsberg and Elbingen in the 12th century, explained their herbal remedies and medical procedures in her book, Physica. In addition to this work on medicine, Hildegard wrote other works on cosmology and theology, corresponded in nearly 400 letters with abbots, popes and emperors, and created at least 70 musical compositions. This OER explores the significance of Hildegard of Bingen.