- Attila, -4531
- Auction copies5
- Augustine, of Hippo, Saint, 354-4307
- Augustinians7
- Augustus, Emperor of Rome, 63 B.C.-14 A.D.1
- Aurispa, Giovanni, approximately 1376-14591
- Austria105
- Austria--Lower Austria1
- Austrian92
- Autographs51
- Autos-da-fé1
- Averroës, 1126-1198. Talkhīs kitāb al-ʻIbārah1
- Averroës, 1126-1198. Talkhīṣ kitāb al-maqūlāt1
- Averroës, 1126-1198. Talkhīṣ madkhal Furfūriyūs1
- Awḍaḥ al-masālik ilá Alfīyat Ibn Mālik (Ibn Hishām, ʻAbd Allāh ibn Yūsuf)3
- Badʼ al-amālī (Ūshī, ʻAlī ibn ʻUthmān)2
- Baglioni, Niccolò1
- Bahaüddin Nakşibend, 1318-13891
- Bahjah al-Wardīyah (Ibn al-Wardī, Zayn al-Dīn ʻUmar ibn al-Muẓaffar)1
- Baldini, Antonio1