Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Britannica Sources used in this answer

Why did Frederick Barbarossa clash with the Lombard League?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
Map of Europe about 800 CE showing the extent of the Frankish kingdom under Charlemagne in light purple, covering much of present-day France, Germany, northern Italy, and neighboring regions. Areas inhabited by Slavic peoples who were tributary to Charlemagne are shaded in a darker purple to the east of the Frankish kingdom, including groups such as the Bohemians, Moravians, and Croats. Major cities, rivers, and neighboring kingdoms are labeled for context.
Holy Roman Empire

Frederick Barbarossa clashed with the Lombard League primarily because he sought to reassert imperial authority and reclaim traditional royal rights (regalia) over the autonomous communes of northern Italy.12

During his campaigns, Frederick aimed to reduce the liberties and jurisdiction of these cities, which viewed his rule as a form of foreign subjection. His efforts to define and enforce imperial rights—notably through the Decrees of Roncaglia—met with fierce resistance from cities like Milan, which had previously been placed under the imperial ban for refusing to answer legal charges.132

The conflict was further intensified by the papacy. Pope Alexander III supported the league as a strategic ally against the emperor, who rejected any notion of papal overlordship and insisted he held the empire from God alone. This struggle for power culminated in several military confrontations, most notably the Battle of Legnano in 1176, where the league’s forces defeated the emperor. The conflict eventually led to the Peace of Constance, where Frederick retained the cities' fealty but was forced to grant them communal liberties and jurisdiction.124