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- Byzantine chant
- Byzantine music
- Byzantine response to OCA autocephaly
- Byzantium
- C. S. Lewis
- Caedmon
- Caesarea
- Caesarea in Cappadocia
- Caesarius of Arles
- Caesaropapism
- Cain and Abel
- Caintigern of Loch Lomond
- Calendar
- Callinicos (Demenopoulos) of Paronaxia
- Callinicus (Kyparissis) of Alexandria
- Callinicus III of Constantinople
- Callinicus IV of Constantinople
- Callinicus I of Constantinople
- Callistratus (Tsintsadze) of Georgia
- Callistus I of Constantinople
- Callistus I of Rome
- Cameroon
- Camp Nazareth
- Candida
- Candle
- Candlemas
- Canon
- Canon (disambiguation)
- Canon (hymn)