- Agriculture1
- Alban, Saint, -304?1
- Alexander, the Great, 356 B.C.-323 B.C.1
- Alfasi, Isaac ben Jacob, 1013-11031
- Algebra1
- Almanach perpetuum celestium motuum (Zacuto, Abraham ben Samuel)1
- Amulets (Judaism)1
- Amānāt wa-al-iʻtiqādāt (Saʻadia ben Joseph)1
- Andria (Terence)1
- Angels1
- Animal culture1
- Animals1
- Annals and chronicles1
- Annunciation to the Blessed Virgin Mary1
- Anthony, of Egypt, Saint, approximately 250-355 or 3561
- Antichrist1
- Apocryphal and legendary literature1
- Apologetic writings1
- Apparitions1
- Aqueducts1