Author
- William Langland2
- William Perault2
- William of Pagula2
- Yom-Tov Lipmann Heller2
- Abraham ben Alexander of Cologne1
- Adam Magister1
- Adam of Eynsham1
- Adrian VI1
- Adriano Castellesi1
- Aelianus Tacticus1
- Al-Mubashshir ibn Fātik1
- Aldobrandino da Siena1
- Alfonso X of Castile and Leon1
- Alfonso de Cartagena1
- Alonso Martin del Canto1
- Ambrosiaster1
- Andrea Gritti1
- Angelus Callimachus de Monteviridi1
- Antonio Millo1
- Arles1