- Alban, Saint, -304?1
- Alchemy--Bibliography1
- Alcuin, 735-804. Correspondence1
- Alexander III, Pope, -11811
- Alexander, de Villa Dei. Doctrinale puerorum1
- Alfonso X, King of Castile and Leon, 1221-12841
- Almanacs, German1
- Alphabets1
- Alum tawed bindings1
- Ambrose, Saint, Bishop of Milan, -3971
- An authorization to perform a ritual slaughter according to the Jewish law by Avraham Mosheh Leʼon of Carpentras to his son Daniʼel, written on 25 of Tamuz 17641
- Angels1
- Angels--Christianity1
- Angels--History of doctrines1
- Angulo family1
- Angulo, Alonso de1
- Animal culture1
- Animals1
- Annals and chronicles1
- Antichrist1