Bücher von Holy Roman Emperor Lothair I

The Holy Roman Emperor, Lothair I, composed two letters to Pope Nicolaus I, and his successor, Pope Adrian II, regarding the nature of his rule over the Frankish realm, and the relationship that his administration would have with the Papal Curia. There is some debate regarding the nature of episcopal appointments in these letters, an issue which would be a continual point of conflict until the last days of the empire.