- Carlos, Prince of Viana, 1421-14611
- Catches1
- Cathedrals1
- Catholic Church. Archdiocese of Salzburg (Austria)1
- Centellas y Confortes, Jaime1
- Centellas, Magdalena de1
- Chamberlain, Walter, active 16th century1
- Charles IV, Duke of Lorraine, 1604-16751
- Charles V, Holy Roman Emperor, 1500-15581
- Christian saints1
- Chronicles1
- Church history1
- Cistercian monasteries1
- Civil law1
- Clare, of Assisi, Saint, 1194-12531
- Clasps1
- Clergy--Appointment, call, and election1
- Commentaries1
- Commonplace books1
- Consanguinity (Canon law)1