The custom was firmly established in Rome itself, and Pope Innocent III, by a letter of 18 January 1200, grants to the canons of St. Peter's the monopoly of casting and selling those "signs of lead or pewter impressed with the image of the Apostles Peter and Paul with which those who visit their thresholds [limina] adorn themselves for the increase of their own devotion and in testimony of the journey which they have accomplished". The pope's language implies that this custom had existed for some time.
The custom was firmly established in Rome itself, and Pope Innocent III, by a letter of 18 January 1200, grants to the canons of St. Peter's the monopoly of casting and selling those "signs of lead or pewter impressed with the image of the Apostles Peter and Paul with which those who visit their thresholds [limina] adorn themselves for the increase of their own devotion and in testimony of the journey which they have accomplished". The pope's language implies that this custom had existed for some time.