- Correspondence1
- Cosimo II, Grand Duke of Tuscany, 1590-16211
- Cosimo III, Grand-Duke of Tuscany, 1642-17231
- Costapellegrina, Giovan Andrea1
- Council of Trent1
- Courts1
- Criminals1
- Criticism, interpretation, etc.1
- Croatia--Šibenik1
- Crucifixion of Jesus Christ1
- Cryptography1
- Cueva y de Castilla, Beltrán III de la, Duke of Alburquerque, -16121
- Cueva, Andrea della1
- Customs administration1
- Dal Borgo family1
- Dante Alighieri, 1265-13211
- Dates (Provenance)1
- Death1
- Del Carretto family1
- Devotional literature1