- Albigenses1
- Alchemy--Bibliography1
- Alexander Balas, King of Syria, -145 B.C.1
- Alexander, de Villa Dei. Doctrinale puerorum1
- Alexius, Saint1
- Alfonso X, King of Castile and Leon, 1221-12841
- Alphabets1
- Ambrose, Saint, Bishop of Milan, -3971
- Amelius, Martyr1
- Amicus, Martyr1
- Annals and chronicles1
- 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