The Concordat of Worms ends the Investiture Controversy
On 23 September 1122 Pope Callixtus II and Emperor Henry V agreed the Concordat of Worms, ending the Investiture Controversy, the long quarrel between the papacy and the German emperors that had run since 1076. Bishops and abbots would be freely elected, but the emperor could send a representative to the elections and invest the chosen men with temporal authority. The compromise drew a clearer line between spiritual and secular power.
Source: Encyclopaedia Britannica: Concordat of Worms ↗
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