New Berceo Manuscript
(Madrid, Biblioteca Nacional MS 13149)

This monograph includes a description, study and partial edition of Berceo’s Mecolaeta manuscript discovered in the Biblioteca Nacional, Madrid. This manuscript is important because it helped to identify previously mysterious fragments of Berceo’s works. It is also important as it helps us confirm the high degree of accuracy of Ibarreta's copyists, as well as giving us versions of works that Ibarreta did not copy.