- Cryptography1
- Cueva y de Castilla, Beltrán III de la, Duke of Alburquerque, -16121
- Customs administration1
- Cynics (Greek philosophy)1
- Czech Republic--Bohemia1
- Dati, Agostino, 1420-14781
- Dati, Jacopo1
- Dati, Niccolò, 1458-1500 or 15011
- Davanzati, Niccolò1
- De institutione musica (Boethius)1
- De motu animalium (Aristotle)1
- De mundo (Aristotle)1
- De partibus animalium (Aristotle)1
- Death1
- Death registers1
- Death--Religious aspects--Christianity1
- Debt cancellation1
- Del Carretto family1
- Del Torto, Andrea1
- Delci, Aldobrando1