Title
- Commentary on Porphyry1
- Commentary on Psalms1
- Common book1
- Commonplace book1
- Compendio delle istorie di Pisa1
- Compendium iuris canonici1
- Compendium religiosi vivendi1
- Confessional1
- Confessione generale1
- Coniecturarum liber1
- Consolation of Philosophy1
- Constitutionibus concilii viennensis1
- Contemplations of the dread and love of God1
- Contra impedimiam1
- Contract1
- Coptic biblical selections1
- Coptic texts1
- Corpus Juris Civilis1
- Corpus juris canonici1
- Correspondence1