Baronius, Bellarmine, Binius, and Surius all questioned the authenticity of the Libri Carolini altogether.
Res gestae saxonicae sive annalium libri tres | Libri Feudorum | Libri feudorum | Libri Carolini | I Quattro Libri dell'Architettura | Guglielmo Libri Carucci dalla Sommaja |
The Council of Frankfurt possessed a Memorandum about iconodulism, which had been produced previously by Frankish theologians on the order of Charlemagne concerning the Byzantine iconoclastic controversy: the Libri Carolini.