Westfrankischen Karolinger (Freiburg, 1848); but those on the pseudo-Isidorian Decretals (Untersuchung 'Ober Alter, Ursprung, u.
In the Cluniac circle was coined the principle: Canonica auctoritas Dei lex est, canon law being taken in the Pseudo-Isidorian sense.
It became" the starting point of the most momentous and gigantic of medieval forgeries, the Isidorian Decretals," where it stands at the head of the pontifical letters, extended to more than twice its original length."This extension perhaps occurred during the 5th century.
In the papal letters of the end of the 9th and the whole of the 10th century, only two or three insignificant citations of the pseudo-Isidore have been pointed out; the use of the pseudo-Isidorian forged documents did not become prevalent at Rome till about the middle of the 11th century, in consequence of the circulation of the canonical collections in which they figured; but nobody then thought of casting any doubts on the authenticity of those documents.