1122 · Worms, Germany

Concordat of Worms

After nearly fifty years of war between popes and emperors over who gets to appoint bishops, a compromise was finally reached — and neither side was fully happy, which is usually how you know a compromise worked.

The Investiture Controversy had been tearing apart Europe since 1076, when Pope Gregory VII and Emperor Henry IV first clashed over whether secular rulers could appoint bishops. It involved excommunications, military campaigns, antipopes, and Henry's famous barefoot walk through the snow at Canossa. Gregory died in exile. Henry died discredited. Their successors kept fighting. By 1122, both sides were exhausted. Pope Callixtus II and Emperor Henry V met at Worms, a city on the Rhine, and hammered out a deal. The emperor gave up the right to invest bishops with the ring and staff — the symbols of spiritual authority. The pope conceded that the emperor could be present at elections and invest the bishop with his temporal holdings — the lands and revenues attached to the office. In Germany, the emperor could attend elections and effectively influence the choice. In Italy and Burgundy, he had less say. It was a messy, imperfect agreement, and both sides tested its limits for centuries afterward. But the Concordat of Worms established a principle that mattered enormously: spiritual authority comes from the Church, not from the state. A king can give a bishop land and expect political loyalty, but he cannot give him his sacred office. That distinction between spiritual and temporal authority became one of the defining features of Western civilization.

Why it matters

Ended the Investiture Controversy by distinguishing spiritual from temporal authority in the appointment of bishops, establishing a foundational principle of Church-state relations in the West.