- Abbaye aux Dames (Caen, France)1
- Abbaye de Corbie1
- Abbaye de Fontfroide1
- Abbaye de Montier-en-Der (Montier-en-Der, France)1
- Abbazia di S. Maria di Porcilia (Padua, Italy)1
- Abbazia di Santa Giustina (Padua, Italy)1
- Abbazia di Santo Stefano (Pistoia, Italy)1
- Abbots1
- Abbots--Appointment, call, and election1
- Abbreviations, Latin1
- Abraham (Biblical patriarch)1
- Absalom (Biblical figure)1
- Absolution1
- Acciaioli, Antonio1
- Acciaioli, Francesco1
- Accursius, glossator, approximately 1182-approximately 12601
- Achilles (Mythological character)1
- Acrostics1
- Actions and defenses1
- Addresses1