- Autos-da-fé3
- Aveiro, Gabriel de Lencastre, Duque de, 1667-17451
- Ayyubids1
- Bahai Faith2
- Ballads1
- Bankers1
- Banks and banking1
- Bargas family1
- Bark papers3
- Barlotta family1
- Barrois, Joseph, approximately 1785-18551
- Basil, Saint, Bishop of Caesarea, approximately 329-3791
- Batak language3
- 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
- Battiferri degli Ammannati, Laura, 1523-15891
- Battle Abbey1
- Battle of Agincourt (Agincourt, France : 1415)1
- Battle of Covadonga (Covadonga, Spain : 718)1
- Battle of Pharsalus (Farsala, Greece : 48 B.C.)1