Pope Lucius III, born Ubaldo Allucingoli, reigned as head of the Catholic Church and ruler of the Papal States from 1 September 1181 to his death in 1185. Born to an aristocratic family in Lucca, prior to being elected pope, he had a long career as a papal diplomat. His papacy was marked by conflicts with Holy Roman Emperor Frederick I, his exile from Rome, and the initial preparations for the Third Crusade.

Pope Lucius III, who reigned as Roman Pontiff from 1181–1185.

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