the.com/heraldry

means The system of designing, displaying, and reading coats of arms and the symbols that identify families, knights, and institutions.

from From Old French 'herault' (herald), the official who announced nobles, proclaimed messages, and kept track of who bore which arms — ultimately traced back through Germanic roots meaning something like 'army' and 'commander' or 'leader of a host.' Heralds weren't just town criers; they were the medieval record-keepers of identity, memorizing shields so they could tell combatants apart on a battlefield where everyone was encased in the same steel. The word for their job eventually became the word for the whole visual system they managed.