This volume makes available for the first time in English the writings about the Holy Roman Empire by Marsiglio of Padua, one of the most influential and original political thinkers of the Latin Middle Ages. The Defensor minor is a restatement and defense of Marsiglio's best known work, the Defensor pacis, and De translatione Imperii applies Marsiglio's general intellectual framework to the question of the exercise of imperial power.