massa

The word may come from Vulgar Latin *mattea or *massa, possibly from Latin mateola (a small mallet). The exact etymology is uncertain, but the weapon is not. A mace was a club with a heavy metal head — flanged, spiked, or rounded — designed to deliver blunt-force trauma through armor. Swords bounced off plate armor. Maces did not. The weapon found its peak usefulness in the fourteenth and fifteenth centuries, precisely when plate armor was at its strongest.

The mace was especially favored by warrior-clergy. Church law technically prohibited clerics from shedding blood. A mace, which crushed rather than cut, was argued to be acceptable under this prohibition. Bishop Odo of Bayeux, William the Conqueror's half-brother, is depicted wielding a mace at the Battle of Hastings in the Bayeux Tapestry. Whether the theological logic was sincere or convenient, the image of fighting bishops with maces is a recurring feature of medieval warfare.

The ceremonial mace evolved from the weapon. By the fifteenth century, maces carried before kings and magistrates symbolized authority. The House of Commons in London cannot conduct business without the mace present. The Sergeant at Arms carries it into the chamber and places it on the table. When the House sits as a committee, the mace is placed below the table. The weapon became a prop. The prop became indispensable.

The weapon is extinct. The ceremony continues. The British Parliament's mace was grabbed by Michael Heseltine in 1976 and by Lloyd Russell-Moyle in 2018 — both acts of political protest. Seizing the mace is one of the most dramatic gestures available in the Commons, precisely because it interrupts the symbol of authority. A medieval skull-crusher became the most important object in British democracy.