- Ciaffini, Tobia de'1
- Cibo, Alderano, 1613-17001
- Cicero, Marcus Tullius1
- Cilli, Antonio1
- Cimatore, Miniato di1
- Cino, Bartholomeo di1
- Cino, Francesca Piccolomini di1
- Cino, Francesco di1
- Cino, Nofrio di1
- Circumcision1
- Cistercian monasteries1
- Cities and towns, Ancient1
- Citizenship1
- Civil service--Examinations1
- Civilization--Islamic influences1
- Civilization--Jewish influences1
- Classical dictionaries1
- Clement VIII, Pope, 1536-16051
- Clementinae constitutiones (Catholic Church)1
- Clergy--Office1