Person depicted
- Christopher Memminger8
- Claudius (Emperor of Rome)15
- Claudius II (Emperor of Rome)35
- Clement Claiborne Clay2
- Cleopatra I (Queen of Egypt)1
- Cleopatra VII Philopator (Queen of Egypt)1
- Clifford Scott Jr.1
- Clinton Hart Merriam1
- Clodius Albinus (Emperor of Rome)2
- Commodus (Emperor of Rome)17
- Concordia (Roman deity)27
- Constans I (Emperor of Rome)128
- Constans II (Byzantine Emperor)3
- Constantine I (Emperor of Rome)221
- Constantine II (Emperor of Rome)138
- Constantius Gallus (Emperor of Rome)2
- Constantius I (Emperor of Rome)10
- Constantius II (Emperor of Rome)352
- Cornelia Salonina (Empress, consort of Gallienus)12
- Cripple Foot4