This book analyses how the three books of visions by Hildegard of Bingen use the allegorical vision as a form of knowledge. It describes how the visionary's use of allegory and allegorical exegesis is linked to theories of cognition, interpretation, and prophecy. It argues that the form of the allegorical vision is not just the product of a medieval symbolic mentality, but specific to Hildegard's position and the major transformations taking place...