- Asceticism--Early church1
- Ashburnham, Bertram Ashburnham, Earl of, 1797-18781
- Assassination1
- Astronomy, Ancient1
- Astronomy, Greek1
- Atlases1
- Aubigné, Agrippa d', 1552-16301
- Autobiographies1
- Autographs1
- Aveiro, Gabriel de Lencastre, Duque de, 1667-17451
- Ayyubids1
- Bahai Faith1
- Ballads1
- Bankers1
- Banks and banking1
- Barrois, Joseph, approximately 1785-18551
- Basil, Saint, Bishop of Caesarea, approximately 329-3791
- 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