The paper traces the misunderstandings of the commentary on the first book of Regum attributed to Gregory the Great. The history of the editions is analyzed till the discovery of the only manuscript known of the work, Cava dei Tirreni, Biblioteca dell'Abbazia 9. The criteria of the last edition by Patrick Verbraken are discussed as he uncritically favored the manuscript on the constitutio textus. The problem of the authorship of the work is investigated: although recent studies date the commentary to the twelfth century and ascribe it to Peter of Venosa on the basis of the Chronicon Venusinum, it is possible that the author used texts authentically gregorian.
