Title
- Quod nemo laeditur nisi a semetipso1
- Quodlibeta1
- Raccolta di celebri arcani1
- Ratification1
- Rationale divinorum officiorum1
- Recipe book1
- Recipes1
- Recipes and extracts on alchemy, medicine, metal-working, cosmetics, veterinary science, agriculture, wine-making, and other subjects1
- Records1
- Registrum Gregorii1
- Registrum epistolarum1
- Regula monachorum1
- Relatione del stato di Milano1
- Relationi de diversi ambasciatori1
- Report on Switzerland1
- Resurrection of Jesus Christ1
- Revelations1
- Rime di Timaute Frascerepnico in vita, e in morte di Elisa1
- Ritual1
- Roman law1