What was a medieval “commune” in many European towns?

The story behind the answer

In many European towns from the 11th–13th centuries, a commune was a sworn association of burghers who collectively governed their community. Through negotiated charters they secured liberties: electing councils and mayors, making bylaws, raising militias, administering justice, and levying taxes—reducing the direct control of local lords or bishops.

These movements grew with the commercial revival; in northern Italy some evolved into powerful city-states (Florence, Milan, Bologna). In France and the Low Countries, places like Laon, Ghent, and Bruges won privileges, sometimes after violent uprisings. A popular saying captured the pull of urban autonomy: “city air makes you free,” reflecting how towns offered escape from feudal bonds.