- Commandments (Judaism)1
- Commandments, Six hundred and thirteen1
- Companions of the Prophet Muhammad1
- Compass1
- Concini, Alessandra Antinori1
- Concini, Arrigo1
- Concini, Bernardo1
- Concini, Lucrezia1
- Concubinage1
- Conquest of Peru (Peru : 1522-1548)1
- Construction industry1
- Contracts1
- Contracts (Islamic law)1
- Contubernium rosae1
- Cornelio, Giovanni1
- Cortesi, Girolamo1
- Cosimo II, Grand Duke of Tuscany, 1590-16211
- Cosimo III, Grand-Duke of Tuscany, 1642-17231
- Costa, Gaspar, active 1533-15341
- Counter-Reformation1