How did the revival of Roman law support Frederick Barbarossa’s claims to imperial authority?

The revival of Roman law in the 12th century, centered at the University of Bologna, provided Frederick I (Barbarossa) with a sophisticated intellectual framework to justify and expand his imperial authority.123

Frederick recognized Roman law as a vital source for legitimizing his actions and centralizing power. By positioning himself as the direct successor to the Roman Caesars, he utilized the Code of Justinian to argue that his imperial rights were inherent and legally grounded, rather than dependent on papal conferment. This shift allowed him to emphasize the secular foundations of his rule, countering the universalist claims of the papacy.1245

To support this agenda, Frederick actively patronized legal scholars, such as the jurist Bulgarus, who served as his advisor. Through initiatives like the Diet of Roncaglia, Frederick sought to define and restore imperial rights, using the expertise of Roman-law jurists to replace fragmented local customs with a more uniform, centralized administration. This legal revival ultimately helped him assert that the emperor’s authority was derived from his status as a sovereign ruler, directly responsible to God.16725

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