- Alba, Fernando Alvarez de Toledo, duque de, 1507-15821
- Albizzi family1
- Alcuin, 735-804. Correspondence1
- Alexander VII, Pope, 1599-16671
- 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
- Algeria--Hippo (Extinct city)1
- Aljamía1
- Almanacs1
- Almucantar1
- Alphabet books1
- Alum tawed thongs (Bindings)1
- Alvarez family1
- Ambassadors1
- Amulets1
- Anecdotes1