- Abbazia di S. Maria di Porcilia (Padua, Italy)1
- Abbazia di Santa Giustina (Padua, Italy)1
- Abbazia di Santo Stefano (Pistoia, Italy)1
- Abridgments1
- Acciaioli, Antonio1
- Acciaioli, Francesco1
- Acciaiuoli, Roberto, 1467-15471
- Account books2
- Accounting143
- Accounts6
- Accursius, glossator, approximately 1182-approximately 12601
- Achilles (Mythological character)1
- Actions and defenses1
- Administration1
- Advent--Liturgy1
- Aeneas (Legendary character)1
- Agamemnon, King of Mycenae (Mythological character)1
- Agriculture1
- Agriculture--Economic aspects1
- Albertus de Fontanella1