 During the Middle Ages, the supposed relic of St. Martin's miraculous cloak, ("cappa Sancti Martini") was carried by the king even into battle, and used as a holy relic upon which oaths were sworn.The cloak is first attested in the royal treasury in 679, when it was conserved at the "palatium" of Luzarches, a royal villa that was later ceded to the monks of Saint-Denis by Charlemagne, in 798/99.The priest who cared for the cloak in its reliquary was called a "cappellanu", and ultimately all priests who served the military were called "cappellani".