- Alessandri, Piero degli9
- Alessandri, Pietro degli2
- Alessandro, Pietro di1
- Alexander, the Great, 356 B.C.-323 B.C.2
- Alexius, Saint1
- Alfonso V, King of Aragon, 1396-14581
- Alfīyah (Ibn Mālik, Muḥammad ibn ʻAbd Allāh)12
- Alfīyat al-ʻIrāqī (ʻIrāqī, ʻAbd al-Raḥīm ibn al-Ḥusayn)2
- Alimony (Islamic law)1
- Allegory1
- Almagest (Ptolemy)1
- Almanacs2
- Almanacs, German1
- Altoviti, Bartolomea1
- Alum tawed bindings1
- Amadori, Lorenzo1
- Ambrogio, Leonardo d'1
- Amedei, Bartolomeo1
- Amelius, Martyr1
- Amicus, Martyr1