- Agustín, Antonio, 1517-1586. Dialogos de medallas inscriciones y otras antiguedades1
- Ajurrūmīyah (Ibn Ājurrūm, Muḥammad ibn Muḥammad)2
- Al-Munajjim al-Kashi, Yahya ibn Imad bin Yahya1
- Alba, Fernando Alvarez de Toledo, duque de, 1507-15821
- Albizzi family1
- Alchemy2
- Alcuin, 735-804. Correspondence1
- Alexander VII, Pope, 1599-16671
- Alexander, the Great, 356 B.C.-323 B.C.2
- Alfonso I King of Asturias, 693-7561
- Alfonso III, King of Asturias and Leon, approximately 848-approximately 9101
- Alfonso V, King of Asturias and León, 994-1027 or 10281
- Alfonso VI, King of Castile and Leon, 1030-11091
- Alfonso VII, The Emperor, King of Castile, 1104-11571
- Alfonso VIII, King of Castile, 1155-12141
- Alfonso X, King of Castile and Leon, 1221-12843
- Alfīyah (Ibn Mālik, Muḥammad ibn ʻAbd Allāh)2
- Algebra4
- Algeria--Hippo (Extinct city)1
- Aljamía1