- Alfonso VII, The Emperor, King of Castile, 1104-11571
- Alfonso VIII, King of Castile, 1155-12141
- Allegories1
- Anaya, Diego de1
- Anaya, Pedro1
- Annals and chronicles1
- Anthologies1
- Aragon (Spain). Cortes1
- Architecture1
- Architecture, Roman1
- Argonauts (Greek mythology)1
- Augustine, of Hippo, Saint, 354-4301
- Augustinians1
- Austria1
- Autographs1
- Autos-da-fé1
- Batista de Lanuza y Tafalla, Miguel, -1659. Vida de la venerable Madre Geronima de San Estevan1
- Batista de Lanuza y Tafalla, Miguel, -1659. Vida de la venerable madre Feliciana de San Ioseph1
- Battle of Covadonga (Covadonga, Spain : 718)1
- Beards1