The Glose super glosas Ysaie: a new work by Peter Comestor?

Abstract The twelfth-century commentary Glose super Glosas Ysaie has been attributed by scholars to Stephen Langton. However, this text is very different from the other commentary by Langton on Isaiah, the so-called Moralitas. On the other hand, the Glose super Glosas ’ exegetical approach, its use of the Ordinary Gloss, and its attention to the letter of the text is very similar to how Peter Comestor comments on the Gospels of John and Matthew. Moreover, the study of the manuscript Cambridge, Trinity College, B.2.15, which belonged to Robert Amiclas, student of Peter Comestor in the mid twelfth-century in Paris, reveals that it contains extracts from the Glose super Glosas Ysaie written by Amiclas himself . Through these and further elements it is possible to challenge the traditional authorship of the Glose super Glosas , and to possibly reattribute this text to Peter Comestor. If this is the case, the Glose super Glosas would be the first example of a commentary on the Old Testament authored by Comestor, with the exception of the Historia Scholastica. The preliminary study of the tradition of both the Moralitas and the Glose super Glosas, and the reattribution of the latter is a fundamental step towards a new understanding of the twelfth-century schools.