- Cornelio, Giovanni1
- Correspondence1
- Cosimo II, Grand Duke of Tuscany, 1590-16211
- Cosimo III, Grand-Duke of Tuscany, 1642-17231
- Cosmography1
- Counter-Reformation1
- Courts1
- Courts and courtiers1
- Coutinho, Francisco de Sousa, 1597 or 1598-16601
- Criminal law1
- Criticism, Textual1
- Criticism, interpretation, etc.1
- De interpretatione (Aristotle)1
- Death and burial of a person1
- Debt cancellation1
- Debtor and creditor1
- Detti, Giovanni Baptista1
- Di Giovanni, Francesco1
- Diplomatic relations1
- Diseases1