| [A1425] | Innocenzo Cibo Ghisi (ca 1550 - 1612) | person | author, dedicatee |
| [A1557] | Cicero (3 January 106 BCE - 7 December 43 BCE) | person | author, represented actor |
| [A1402] | Bartłomiej Cieszyński | person | author |
| [A513] | Katarzyna Cieślak | person | author |
| [A1718] | Stanisław Cikowski (died 23 April 1617) | person | dedicatee, represented actor |
| [A896] | Joachim Cimdarsus (1 June 1553 - 10 February 1618) | person | author |
| [A702] | Erazm Ciołek (28 February 1474 - 9 September 1522) | person | commissioner, dedicatee, represented actor |
| [A1260] | Niccolò Circignani (1517/1524 - after 1596) | person | painter |
| [A2933] | Cistercians (Ordo Cisterciensis) | corporate actor | |
| [A1413] | Clare of Assisi (16 July 1194 - 11 August 1253) | person | represented actor |
| [A3035] | Samuel Clarke (11 October 1675 - 17 May 1729) | person | |
| [A3241] | Claude of France (13 October 1499 - 26 July 1524) | person | represented actor |
| [A296] | Claude of France, Duchesse of Lorraine (12 November 1547 - 21 February 1575) | person | dedicatee |
| [A2709] | Claudia (born 57 BCE/56 BCE) | person | represented actor |
| [A2719] | Claudia Antonia (ca 30 - 66) | person | represented actor |
| [A2726] | Claudia Augusta (January 63 - May 63) | person | represented actor |
| [A2723] | Claudia Octavia (39/40 - 9 June 62) | person | represented actor |
| [A2289] | Claudius II Gothicus (Roman emperor) (May 214 - 270) | person | represented actor |
| [A1374] | Claudius (Roman emperor) (1 August 10 BCE - 13 October 54) | person | represented actor |
| [A211] | Jean Clein (ca 1466 - 1530) | person | printer, represented actor |
