Thomas F. X. Noble in this book examines the origins and nature of papal lands in Italy. In the course of his discussion he untangles a thorny array of papal, Byzantine, and other sources, most of which use difficult terminology (vocabulary which may or may not have a very different legal meaning that previous or subsequent meanings, for example, or which may mean very different things in different contexts even within the period in question). His study perforce touches on the legal, social, and economic aspects of land-holding, political and military developments, and changes in papal governance (including the administrative styles and agendas of key popes). This work is an important prerequisite to study of subsequent papal developments.