- Anthony, of Padua, Saint, 1195-12311
- Antiphons (Music)1
- Apostasy--Catholic Church1
- Aragon (Spain). Cortes1
- Architecture1
- Architecture, Roman1
- Argonauts (Greek mythology)1
- Arithmetic1
- Astrology1
- Atlases (Geographic)1
- Auction copies1
- Augustine, of Hippo, Saint, 354-4301
- Augustinians1
- Austria1
- Averroës, 1126-1198. Talkhīs kitāb al-ʻIbārah1
- Averroës, 1126-1198. Talkhīṣ kitāb al-maqūlāt1
- Averroës, 1126-1198. Talkhīṣ madkhal Furfūriyūs1
- Azharot1
- Bacán, Hernando de1
- Batista de Lanuza y Tafalla, Miguel, -1659. Vida de la venerable Madre Geronima de San Estevan1