Which Holy Roman Emperor is linked to the Investiture Controversy and the walk to Canossa (1077)?

The story behind the answer

He clashed with Pope Gregory VII over lay investiture—the right of secular rulers to appoint bishops. Excommunicated and facing rebellion at home, he crossed the Alps in winter and stood barefoot in the snow outside Matilda of Tuscany’s fortress at Canossa in 1077 to seek absolution, a dramatic act of penance that temporarily restored his standing.

The Investiture Controversy reshaped medieval politics, sharpening the divide between spiritual and temporal authority. In the empire, it fueled civil war and eroded royal control; across Europe, it strengthened papal claims to moral supremacy. The dispute’s formal compromise came later with the Concordat of Worms (1122) under his son, which split spiritual and secular aspects of episcopal appointment. “Going to Canossa” later became shorthand for political humiliation—famously invoked by Bismarck.