- 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
- Alfonso X, King of Castile and Leon, 1221-12841
- Allegories1
- Almucantar1
- Alvarez family1
- Anthologies1
- Apologetic writings1
- Armenia1
- Armenian language1
- Armenian language, Classical1
- Assassination1
- Astrology1
- Astronomical instruments1
- Astronomy, Arab--Tables1