The spread of armorial bearings across Europe soon gave rise to a new occupation: the herald, originally a type of messenger employed by noblemen, assumed the responsibility of learning and knowing the rank, pedigree, and heraldic devices of various knights and lords, as well as the rules and protocols governing the design and description, or "blazoning" of arms, and the precedence of their bearers. As early as the late thirteenth century, certain heralds in the employ of monarchs were given the title "King of Heralds", which eventually became "King of Arms."