- Aegidius, Saint, Abbot1
- Aesop's fables2
- Affinity (Law)1
- Afghanistan--Herat2
- Africa2
- Africa--Atlantic Coast1
- Agazaria, Claudio Boncompagni di1
- Aggada1
- Agnihotra (Hindu rite)1
- Agriculture3
- Agustín, Antonio, 1517-1586. Dialogos de medallas inscriciones y otras antiguedades1
- Ajurrūmīyah (Ibn Ājurrūm, Muḥammad ibn Muḥammad)5
- Alba, Fernando Alvarez de Toledo, duque de, 1507-15821
- Albizzi, Costanza1
- Albums1
- Alchemy11
- Alchemy--Manuscripts1
- Alcoholism--Religious aspects--Islam1
- Aleramo, Marquis of Monferrato, -9671
- Alexander III, Pope, -11812