Author
- Continuator of Martin of Troppau1
- Convento de São Domingos de Benfica1
- Coptic Orthodox Church7
- Cormick, John, -18331
- Cornelius Nepos1
- Cosimo Bartoli1
- Cosimo I de' Medici, Grand Duke of Tuscany1
- Council of Basel1
- Couvent des Jacobins de la rue Saint-Jacques2
- Cristoforo di Guidantonio de Piccolomini1
- Cudamani1
- Cyprian2
- Cyprián Karásek Lvovický1
- Cyriacus Schnauß1
- Cyriacus, Bishop of al-Bahnasā1
- Cyril of Alexandria1
- Cyril of Jerusalem1
- Cyrillus de Quidenon2
- D. Gomez Davila, Marques de Velada1
- Da'ud Abu al-Fadl1