Author
- Christine de Pizan1
- Christopher John Davenport1
- Clement V1
- Coelius Sedulius1
- Consiglio Generale1
- Continuator of Martin of Troppau1
- Coptic Orthodox Church1
- Council of Basel1
- Cristoforo di Guidantonio de Piccolomini1
- Cyrillus de Quidenon1
- David Abudirham1
- Dawūd al-Qayṣarī1
- De Lazara, Nicoló1
- Duchy of Milan1
- Einhard1
- Euclid1
- Eutropius1
- Fakhr al-Din al-Razi1
- Faustus of Riez1
- Feo Belcari1