- Cesare d'Este, Duke of Modena and Reggio, 1552-16281
- Chiesa di Sant'Antonio da Padova (Palermo, Italy)1
- Christian converts from Judaism1
- Church and state1
- Church history1
- Clement VIII, Pope, 1536-16051
- Clothing and dress1
- Codaro, Abramo1
- Commerce1
- Concini family1
- Concini, Alessandra Antinori1
- Concini, Arrigo1
- Concini, Giovanbattista1
- Controversial literature1
- Correspondence1
- Cortesi, Girolamo1
- Cosimo II, Grand Duke of Tuscany, 1590-16211
- Cosimo III, Grand-Duke of Tuscany, 1642-17231
- Del Carretto family1
- Dowry1