Author
- Archduke Ernest of Austria1
- Aristotle29
- Arjāsp Umīdī al-Ṭihrānī1
- Arles1
- Armenian Catholic Church2
- Arnaldus de Villa Nova4
- Arnold Goerinus1
- Arnulf of Bohéries1
- Arnulf of Lisieux1
- Arnulf of Orléans1
- Arrigucci family1
- Arşı Baba1
- Asad Allāh ibn ʻAbd al-Ghaffār Nādir Māzandarānī1
- Ascanio Savorgnano2
- Ascanio Sforza1
- Ashtavakra2
- Asiriddini Akhsikatī1
- Asmus Biersteden1
- Assar Tabrizi2
- Assembly of the French clergy1