- Cosimo I, Grand-Duke of Tuscany, 1519-15741
- Cosmology1
- Costapellegrina, Giovan Andrea1
- Council of Pisa--(2nd : 1511-1512)1
- Creeds1
- Criminal law1
- Criticism, Textual1
- Criticism, interpretation, etc.1
- Cueva y de Castilla, Beltrán III de la, Duke of Alburquerque, -16121
- Cults1
- Cyprian War (1570-1571)1
- Dante Alighieri, 1265-13211
- Dates (Provenance)1
- De consolatione philosophiae (Boethius)1
- De finibus bonorum et malorum (Cicero, Marcus Tullius)1
- Death--Religious aspects--Catholic Church1
- Decorated edges1
- Devotional literature, Italian1
- Diagnosis1
- Didactic literature, Latin1