- Amelius, Martyr1
- Amicus, Martyr1
- Antiphonaries1
- Aphorisms (Hippocrates)1
- Apocryphal and legendary literature1
- Arabic poetry1
- Arbalet, Jean1
- Ark of the Covenant1
- Artedo, Petrus de1
- Assumption of the Blessed Virgin Mary1
- Astrology, Arab1
- Astronomical instruments1
- Astronomy, Arab1
- Averroës, 1126-1198. Talkhīs kitāb al-ʻIbārah1
- Averroës, 1126-1198. Talkhīṣ kitāb al-maqūlāt1
- Averroës, 1126-1198. Talkhīṣ madkhal Furfūriyūs1
- Balances (Weighing instruments)1
- Baptism1
- Baptism of Jesus Christ1
- Barberino, Bardo da1