sentences:  Bishop Audax (904-926) obtained the confirmation of the liberties of the Church of Asti from King Berengarius, and was a friend of Rudolph of Burgundy.He sought to have hisCanons called "cardinals", as they were at S, Eusebio in Vercelli.The bishops of Asti were feudatory vassals of the Holy Roman Empire and of the Counts (Dukes) of Savoy.