- Astronomy2
- Atlases (Geographic)3
- Augustine, of Hippo, Saint, 354-4301
- Augustinians1
- Austria1
- Authors, Classical18
- Autograph albums1
- Autographs3
- Autos-da-fé4
- Bacán, Hernando de1
- Barbarossa, -15461
- Bargas family1
- 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
- Battle of Lepanto (Greece : 1571)1
- Beards1
- Belgium3
- Bello family1
- Belvis family1