Modena, Archivio Capitolare, O.I.12
From Clavis Canonum
Copy of Collectio Dionysiana II not in Kéry according to d'Avray, but actually listed there as sole copy of the Collectio Mutinensis (not in Clavis).
Note that Linda referred to the library as "Biblioteca Capitolare Eusebiana" (apparently confusing it with the Vercelli library).