- Church history--Middle Ages1
- Church history--Sources1
- Church property1
- Cicero, Marcus Tullius. De finibus bonorum et malorum1
- Ciphers1
- Cities and towns, Ancient1
- Civil procedure1
- Clement VIII, Pope, 1536-16051
- Clergy1
- Clergy--Appointment, call, and election1
- Clinical medicine1
- Clusius, Carolus, 1526-16091
- Coen, Caim, active 17th century1
- Collections1
- Comedy plays1
- Command of troops1
- Commandments, Six hundred and thirteen1
- Concordances1
- Confession (Jewish law)1
- Confession (Liturgy)1