- Astronomy, Arab1
- Astronomy, Medieval1
- Astronomy--Tables1
- Atlases (Geographic)1
- Aurispa, Giovanni, approximately 1376-14591
- Autos-da-fé1
- Badr al-ṭāliʻ fī ḥall Jamʻ al-jawāmiʻ (Maḥallī, Jalāl al-Dīn Muḥammad ibn Aḥmad)1
- Baglioni, Niccolò1
- Bahaüddin Nakşibend, 1318-13891
- Bahjah al-Wardīyah (Ibn al-Wardī, Zayn al-Dīn ʻUmar ibn al-Muẓaffar)1
- Baldini, Antonio1
- Baldo, Antonio di1
- Baldo, Vestro di1
- Balducci, Domenico1
- Balducci, Nonnina1
- Balestriere, Antonio1
- Ballads1
- Bandinelli, Lisabetta1
- Bandinelli, Lodovico1
- Baraita of 32 rules1