- Ajurrūmīyah (Ibn Ājurrūm, Muḥammad ibn Muḥammad)2
- Alberto, Alberto di2
- Alessandri, Bartolomeo degli2
- Alessandri, Pietro degli2
- Alfīyat al-ʻIrāqī (ʻIrāqī, ʻAbd al-Raḥīm ibn al-Ḥusayn)2
- Algebra2
- Alum tawed bindings2
- Amulets (Judaism)2
- Andrea, Giovanni di2
- Anne (Mother of the Virgin Mary), Saint2
- Anthony, of Egypt, Saint, approximately 250-355 or 3562
- Antichrist2
- Apocryphal and legendary literature2
- Apologetic writings2
- Arabic language--Figures of speech2
- Arabic language--Metrics and rhythmics2
- Arabic language--Versification2
- Aramaic language2
- Armaiolo, Francesco2
- Astronomy, Ancient2