Author
- Adam of Aldersbach1
- Adam of Bockenfield1
- Adam of Eynsham1
- Adrian VI1
- Adriano Castellesi1
- Aelianus Tacticus1
- Agnes de Cavaciis1
- Agnes de Claustris1
- Alain Chartier1
- Alain of Lille1
- Alexander III1
- Alexander IV1
- Alexander V1
- Alexander VI1
- Alfonso de Cartagena1
- Alfred of Sareshel1
- Alulphe of Tournai1
- Alvise I Mocenigo1
- Ambrosiaster1
- Andrea Piccolomini Todeschini1