- Cid, approximately 1043-10991
- Cilli, Antonio1
- Cimatore, Miniato di1
- Cino, Bartholomeo di1
- Cino, Francesca Piccolomini di1
- Cino, Francesco di1
- Cino, Nofrio di1
- Circle--Religious aspects1
- Circumcision1
- Circumcision--Religious aspects--Islam1
- Cities and towns, Ancient1
- Citizenship1
- Civil procedure (Islamic law)1
- Civil service--Examinations1
- Civilization--Islamic influences1
- Civilization--Jewish influences1
- Classical biography1
- Classical dictionaries1
- Clement VI, Pope, approximately 1291-13521
- Clement VIII, Pope, 1536-16051