- Aegidius, Saint, Abbot1
- Afghanistan--Herat1
- Africa1
- Africa--Atlantic Coast1
- Agazaria, Claudio Boncompagni di1
- Aggada1
- Agnihotra (Hindu rite)1
- Ajurrūmīyah (Ibn Ājurrūm, Muḥammad ibn Muḥammad)1
- Albizzi, Costanza1
- Alcoholism--Religious aspects--Islam1
- Aleramo, Marquis of Monferrato, -9671
- Alexander III, Pope, -11811
- Alfonso II, King of Naples, 1448-14951
- Alfonso X, King of Castile and Leon, 1221-12841
- Algebra1
- Aljamía1
- Allegories1
- Allegory1
- Almanacs1
- Alphabet--Religious aspects--Islam1