- Cocchi Donati, Piera1
- Codaro, Abramo1
- Coen, Caim, active 17th century1
- Coligny, Gaspard de, seigneur de Châtillon, 1519-15721
- Collects1
- Collégiale Saint-Vincent de Soignies1
- Collégiale Sainte-Gertrude (Nivelles, Belgium)1
- Colombino, Giorgio di1
- Colored papers1
- Combe, John1
- Comedy plays1
- Commercial law1
- Communion of saints in the liturgy1
- Concini family1
- Concini, Alessandra Antinori1
- Concini, Arrigo1
- Concini, Giovanbattista1
- Confraternitate Sancta Maria Rotunda (Confraternity : Milan, Italy)1
- Confraternities (Canon law)1
- Consanguinity1