Frederick I, also known as Frederick Barbarossa, was the Holy Roman Emperor from 1155 until his death. Historians consider him among the Holy Roman Empire's greatest medieval emperors. He combined qualities that made him appear almost superhuman to his contemporaries: his ambition, his skills at organization, his battlefield acumen and his political perspicuity. Among his contribution to Central European society and culture include the re-establishment of the Corpus Juris Civilis, or the Roman rule of law, which counterbalanced the papal power that dominated the German states since the conclusion of the Investiture Controversy. Frederick died in 1190 in Asia Minor while leading an army in the Third Crusade.