Encyclopedias, Almanacs, Transcripts, and Maps
- Constantinople II, Council of
- Constantinople III, Council of
- Constantinople IV, Council of
- Constantinople, Ecumenical Patriarchate of
- Constantius II, Roman Emperor
- Constantius of Fabriano, Bl.
- Consubstantiality
- Consultation on Church Union
- Consultation on Common Texts
- Contarini, Giovanni
- Contemplative Life
- Contempt of Court
- Contenson, Guillaume Vincent de
- Contraception
- Contractors
- Contradiction, Principle of
- Contrition
- Contritionism
- Contumely
- Convenientia, Argumentum Ex