- Cristoforo, Pietro di1
- Croatia--Dalmatia1
- Crusades (Fifth) (1218-1221)1
- Crusades (Fourth) (1202-1204)1
- Cuenca, Alonso Gaytan de1
- Cuenca, Francisco Gaytan de1
- Cuenca, Juan Gaytan de1
- Cueva y de Castilla, Beltrán III de la, Duke of Alburquerque, -16121
- Cynics (Greek philosophy)1
- Cyprus1
- Cyprus--Paphos (District)1
- Czech Republic--Prague1
- Dal Borgo family1
- Damanhūrī, Aḥmad ibn ʻAbd al-Munʻim1
- Dati, Agostino, 1420-14781
- Dati, Jacopo1
- Dati, Niccolò, 1458-1500 or 15011
- Davanzati, Niccolò1
- De pulsibus libellus ad tirones (Galen)1
- De' Medici, Luigi, principe di Ottaviano, 1759-18301