The Peace of Constance is signed on June 25, 1183 ending the conflicts between the Holy Roman Emperor Frederick I (Barbarossa) and the Lombard League that granted autonomy to the Italian city-states, ending years of conflict. The treaty officially recognized the league's existence and allowed the cities to maintain their communal liberties, legal jurisdiction, and alliances, in exchange for fealty to the Emperor. This agreement was a result of the Emperor's military defeat at the Battle of Legnano in 1176.
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