- Astrology, Roman1
- Astronomical instruments1
- Astronomy, Arab1
- Atlantic Ocean--English Channel1
- Augustinians1
- Averroës, 1126-1198. Talkhīs kitāb al-ʻIbārah1
- Averroës, 1126-1198. Talkhīṣ kitāb al-maqūlāt1
- Averroës, 1126-1198. Talkhīṣ madkhal Furfūriyūs1
- Balances (Weighing instruments)1
- Ballads1
- Baptism1
- Baptism of Jesus Christ1
- Barberino, Bardo da1
- Bassianus, of Glisate1
- Battle of Pharsalus (Farsala, Greece : 48 B.C.)1
- Beeleye, John de1
- Beeleye, Margery de1
- Belgium--Nivelles1
- Benedictine monasteries1
- Berengarius, Raimundus1