- Benavides family1
- Benefices, Ecclesiastical1
- Bible. Old Testament1
- Blaeu, Willem Janszoon, 1571-1638. Teatrum orbis terrarum1
- Bookplates1
- Brass bosses (Bindings)1
- Bucolica (Virgil)1
- Callistus II, Pope, -11241
- Campoy family1
- Cardona, Catalina de, 1519-15771
- Caro, Ana1
- Castile (Kingdom). Cortes1
- Catholic Church. Province of Santiago de Compostela (Spain)1
- Charles V, Holy Roman Emperor, 1500-15581
- Christianity and other religions1
- Christianity--Apologetic works1
- Chronologies1
- Cid (Epic cycle)1
- Cid, approximately 1043-10991
- Ciphers1