Author
- Anselm of Canterbury1
- Anthonius Charrcon1
- Antoine Vincent1
- Antonia Piccolomini1
- Antonio dalle Conchelle1
- Antonio de Raho1
- Antonio di Domenice di Ciacco1
- Antonius Ferro1
- Antonius de Carlenis1
- Antonius de Vecelli1
- Antonius of Vercelli1
- Arles1
- Armenian Catholic Church1
- Athanasius of Alexandria1
- Attar of Nishapur1
- Augustinians1
- Augustinus Triumphus1
- Augustinus de Leonissa1
- Aulus Gellius1
- Awhadi Maraghai1