sentences:  One of them declared that bishops should provide next to their cathedral an enclosed space ("claustrum") in which they and their clergy should serve God according to a Canonical Rule.No evidence indicates whether his commitment went beyond his signature, but Canons existed in Asti thirty years later.On 7 May 907, Pope Sergius III confirmed, at Bishop Audax' own request, all the possessions, rights and privileges which Bishop Audax had granted to the Canons.