Author
- António Nunes Ribeiro Sanches1
- Arles1
- Armenian Catholic Church1
- Arnaldus de Villa Nova1
- Arnulf of Bohéries1
- Arrigucci family1
- Ascanio Savorgnano1
- Augustine of Hippo1
- Augustinians1
- Augustinus de Leonissa1
- Averroes1
- Azar Bigdeli1
- Aḥmad ibn Qāsim Ghazzī1
- Aḥmad ibn Ḥusayn Ibn al Qunfudh1
- Bagnano family1
- Bartholomaeus de Montagna1
- Bartholomeus de Vitellensibus de Corneto1
- Bartholomew of Braganca1
- Bartholomäus Mariensüss1
- Bartolomeo Fontana1