Author
- Albert de Löwenstein-Wertheim-Virnebourg1
- Alberto Cattani1
- Albertus de Saxonia1
- Albrecht von Bonstetten1
- Alexander Bonini1
- Alexander V1
- Alexander VI1
- Alfonso de Cartagena1
- Alfred John Dunkin1
- Alfred of Sareshel1
- Alonzo de Santa Cruz1
- Alulphe of Tournai1
- Ambrosiaster1
- Andrea Amadio1
- Andreas Raumburger1
- Andreas de Escobar1
- Andrew Welch1
- Angelo Gambiglioni1
- Angelus Callimachus de Monteviridi1
- Anselm of Laon1