Pope Julius II stated in his bull which created the diocese, ...erigimus, creamus, et instituimus... et Sedi Apostolicae immediate subjectam esse volumus et decernamus....
Keuskupan tersebut sekarang adalah sebuah suffragan dari Keuskupan Agung Torino. ^ Pope Julius II stated in his bull which created the diocese, ...erigimus, creamus, et instituimus... et Sedi Apostolicae immediate subjectam esse volumus et decernamus....