Title
- Prolegomena in Aristotelem1
- Prose1
- Proverbs1
- Questiones super secundo sententiarum1
- Questo e` il sonnetto ritrovato1
- Quid sit annus solaris1
- Quodlibeta1
- Raccolta di celebri arcani1
- Rationale divinorum officiorum1
- Recipe book1
- Recipes1
- Recipes and extracts on alchemy, medicine, metal-working, cosmetics, veterinary science, agriculture, wine-making, and other subjects1
- Register1
- Registrum Gregorii1
- Registrum epistolarum1
- Regula monachorum1
- Relationi de diversi ambasciatori1
- Religious text1
- Revelations1
- Roman law1