- Banks and banking1
- Barbarossa, -15461
- Batignano, Carlo Gasparie di1
- Battle of Lepanto (Greece : 1571)1
- Bernardini, Jacopo1
- Bishops--Temporal power1
- Bookplates1
- Booksellers' labels1
- Byzantine chants1
- Cacciaguerra, Renaldus1
- Canon law1
- Cardinals--Biography1
- Catholic Church. Diocese of Sion (Switzerland)1
- Cavalcanti, Aldobrandino, 1217-12791
- Charlemagne, Emperor, 742-8141
- Charles V, Holy Roman Emperor, 1500-15581
- Church finance1
- Cino, Bartholomeo di1
- Cino, Francesca Piccolomini di1
- Cino, Francesco di1