- Cistercians--Liturgy--Texts--Manuscripts1
- Cities and towns, Ancient1
- Citizenship1
- City planning1
- Civil procedure1
- Clare, of Assisi, Saint, 1194-12531
- Clasp straps1
- Classical biography1
- Classical literature1
- Clementinae constitutiones (Catholic Church)1
- Clergy--Office1
- Clergy--Pensions1
- Clergy--Prayers and devotions1
- Clergy--Religious life1
- Clergy--Taxation1
- Clinical medicine1
- Cocchi Donati, Antonio1
- Cocchi Donati, Piera1
- Coen, Caim, active 17th century1
- Collault, Étienne, active 1512-15451