- Armies1
- Armorial bindings1
- Arnaldus, de Villanova, -13111
- Arte della lana (Guild : Florence, Italy)1
- Asher Yeshaʻy., a.b.d. ḳ. Ropshits1
- Asia1
- Astronomy, Medieval1
- Augustine, of Hippo, Saint, 354-4301
- Aurispa, Giovanni, approximately 1376-14591
- Aveiro, Gabriel de Lencastre, Duque de, 1667-17451
- Awḍaḥ al-masālik ilá Alfīyat Ibn Mālik (Ibn Hishām, ʻAbd Allāh ibn Yūsuf)1
- Ayyubids1
- Bakers1
- Bartoli, Dianora1
- Bartoli, Giannozzo1
- Bartolomeo, da Petroio, 1488?-15541
- Basil, Saint, Bishop of Caesarea, approximately 329-3791
- Basilica di S. Marco Evangelista al Campidoglio (Rome, Italy)1
- Basmalah1
- Batini, Andreas1