Author
- Burchard of Mount Sion1
- Caesarius of Arles1
- Carlo Marsuppini1
- Carthusian Order1
- Castino1
- Cherubino da Spoleto1
- Christopher John Davenport1
- Clement V1
- Coelius Sedulius1
- Consiglio Generale1
- Continuator of Martin of Troppau1
- Council of Basel1
- Cristoforo di Guidantonio de Piccolomini1
- De Lazara, Nicoló1
- Duchy of Milan1
- Einhard1
- Elias of Cortona1
- Enguerrand de Monstrelet1
- Euclid1
- Eugene IV1