- Books of hours1
- Booksellers' labels1
- Botany, Medical1
- Bread1
- Breviaries1
- Bridget, of Sweden, Saint, approximately 1303-13731
- Brutus, Marcus Junius, 85 B.C.?-42 B.C.1
- Brutus, the Trojan (Legendary character)1
- Byzantine chants1
- Cacciaguerra, Renaldus1
- California--San Marino1
- Cardinal virtues1
- Cardinals1
- Cardinals--Biography1
- Carthusians1
- Catherine, of Alexandria, Saint1
- Cavalcanti, Aldobrandino, 1217-12791
- Charters1
- Christian ethics--Catholic authors1
- Christian ethics--Early church1