- Astrology, Roman1
- Aubertus, de Galardone1
- Baptism1
- Baptism of Jesus Christ1
- Barberino, Bardo da1
- Bartholomeo, de Soncino1
- Bartholomew, of San Concordio, 1262-13471
- Bassianus, of Glisate1
- Battle of Pharsalus (Farsala, Greece : 48 B.C.)1
- Bede, the Venerable, Saint, 673-7351
- Beeleye, John de1
- Beeleye, Margery de1
- Belgium--Mons1
- Belgium--Nivelles1
- Belgium--Tournai1
- Benedictine monasteries1
- Benedictine nuns1
- Benedictines--Rules1
- Benedictus Dominus Deus Israel (Music)1
- Berengarius, Raimundus1