- Abbazia di Santo Stefano (Pistoia, Italy)1
- Acciaioli, Antonio1
- Acciaioli, Francesco1
- Accounts1
- Accursius, glossator, approximately 1182-approximately 12601
- Achilles (Mythological character)1
- Administration1
- Advent--Liturgy1
- Aeneas (Legendary character)1
- Agriculture1
- Agriculture--Economic aspects1
- Albertus de Fontanella1
- Albums1
- Albums (Books)1
- Alchemy1
- Aldobrandini, Giovanni degli1
- Alessandri, Bartolomeo degli1
- Alessandri, Piero degli1
- Alexander III, Pope, -11811
- Algeria--Hippo (Extinct city)1