This book investigates the historical and theological basis for the temporal sovereignty of the Pope. It examines the arguments and evidence used to support the Pope's claim to temporal power throughout history. The work likely draws upon historical documents, theological treatises, and papal pronouncements to construct its argument.

The book's focus on the temporal sovereignty of the Pope suggests a scholarly examination of a specific historical and theological concept. The subject matter points to a dense, academic text likely intended for readers with an interest in church history, political theology, or the history of the Papal States. The publication date of 1860 indicates it is a historical work reflecting the scholarship and perspectives of that era.