- Astronomy, Ancient1
- Astronomy, Arab--Tables1
- Atlases1
- Aubigné, Agrippa d', 1552-16301
- Auctions1
- Augustus, Emperor of Rome, 63 B.C.-14 A.D.1
- Austria--Kitzbühel1
- Authorship1
- Autobiographies1
- Aveiro, Gabriel de Lencastre, Duque de, 1667-17451
- Ayyubids1
- Ballads1
- Bankers1
- Banks and banking1
- Bargas family1
- Barlotta family1
- 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