Miracles are said to have to occurred at his tomb. In 835 Bishop Aldrich placed some relics of his body into an altar in the cathedral, and in the following year, on the instructions of Emperor Louis the Pious, sent the body to Bishop Badurad of Paderborn, a diocese founded in 799 by Pope Leo III and Emperor Charlemagne that had no saint of its own.
From this arose a "bond of lasting brotherhood" that has survived all the hostilities of the succeeding centuries and is considered to be the oldest contract still in force. Both churches bound themselves to help each other by prayer and material assistance, as they have in fact done on more than one occasion.
Since Liborius died in the arms of his friend Martin of Tours, he is looked to as a patron of a good death. Since the thirteenth century he is prayed to for assistance against that gallstones that are caused by the water of the limestone area; the first account of a healing of this kind concerns the cure of Archbishop Werner von Eppstein, who came on pilgrimage to the saint's shrine in 1267. This is the origin of the saint's attribute of three stones placed on a copy of the Bible. In the same period he became the patron of the cathedral and the archdiocese, rather than the Blessed Virgin Mary and Saint Kilian, who were previously in first place. And as stated above, he is seen as a patron of peace and understanding among peoples. He is invoked against colic, fever, and gallstones.
As well as being shown as a bishop carrying small stones on a book, Saint Liborious is also shown with the attribute of a peacock, because of a legend that, when his body was brought to Paderborn, a peacock guided the bearers.
The popularity of the saint in Paderborn is shown in the week-long yearly festival that begins on the Saturday after his 23 July feast day.