- Corbinelli, Pandolfo1
- Cornelio, Giovanni1
- Cornell University1
- Cornerpieces (Furniture)1
- Corpus juris civilis1
- Correspondence5
- Correspondence (Cyprian, Saint, Bishop of Carthage)1
- Corsini, Bartolomeo1
- Corsino, Pietro di1
- Cortesi, Girolamo1
- Cosimo I, Grand-Duke of Tuscany, 1519-15744
- Cosimo II, Grand Duke of Tuscany, 1590-16211
- Cosimo III, Grand-Duke of Tuscany, 1642-17231
- Cosmography1
- Cosmology1
- Costapellegrina, Giovan Andrea1
- Council of Pisa--(2nd : 1511-1512)1
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- Covoni, Luigi de1
- Creeds1