- 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, 1221-12841
- Almucantar1
- Alvarez family1
- Ana, Queen, consort of Philip II, King of Spain, 1549-15801
- Annals and chronicles1
- Annotations1
- Anwār al-tanzīl wa-asrār al-taʼwīl (Bayḍāwī, ʻAbd Allāh ibn ʻUmar)1
- Aphorisms and apothegms1
- Apologetic writings1
- Arabic language--Lexicology1
- Arabic language--Semantics1
- Arabic language--Syntax1
- Arabic philology1
- Ashkenazim1
- Astronomy1
- Bartolomeo, da Petroio, 1488?-15541
- Battle of Covadonga (Covadonga, Spain : 718)1