- Astronomy, Arab1
- Astronomy, Greek1
- Banks and banking1
- Baptism--Catholic Church1
- Barberino, Bardo da1
- Bardi, Giovanni de', conte di Vernio, 1534-16121
- Baronto, Francesca di1
- Baronto, Taddeo di1
- Baronto, Ventura di1
- Barontolo, Barontolo di1
- Bartholomew, of San Concordio, 1262-13471
- Beeleye, John de1
- Beeleye, Margery de1
- Belgium--Tournai1
- Belvis family1
- Benedetto, Bartolomeo di1
- Benediction of the Blessed Sacrament (Music)1
- Benedictionals1
- Benedictus Dominus Deus Israel (Music)1
- Bianchi, Giunta1