as also the denomination given to divers other metallic ornaments made after the same form; and in this sense bulle seems to include all gold and silver ornaments of a roundish form, whether worn on the habits of men, the trappings of horses, or the like. Such were those decorations used by the ancients on their doors and belts. The bulle of doors were a kind of large-headed nails fastened on the doors of the rich, and kept bright with great care. The doors of temples were sometimes adorned with golden bulle.
Mr Bandelot takes the bulle worn by soldiers on their belts to be something more than mere ornaments. They seem to have been considered as preservations from dangers and diseases, and even means of acquiring glory, and other advantages. The like may perhaps be extended to the bulle on doors, which were probably placed there as a security to them from being broken or violated.