The power of the pope during the Middle Ages : or, An historical inquiry into the origin of the temporal power of the Holy See and the constitutional laws of the Middle Ages relating to the deposition of sovereigns ; with an introduction, on the honours and temporal privileges conferred on religion and on its ministers by the nations of antiquity, especially by the first Christian emperors, nations of antiquty, especially by the first Christian emperors
Gosselin, Jean Edmé Auguste, 1787-1858; Kelly, Matthew, 1814-1858