- Actions and defenses1
- Administration1
- Advent sermons1
- Aeneas (Legendary character)1
- Aeneis (Virgil)1
- Affinity (Law)1
- Agamemnon, King of Mycenae (Mythological character)1
- Agnes, Saint, Martyr1
- Agreda, Dominici d'1
- Agriculture--Economic aspects1
- Albertus de Fontanella1
- Albigenses1
- Alchemy--Bibliography1
- Aldobrandini, Giovanni degli1
- Alessandri, Alessandro degli1
- Alessandri, Niccolò degli1
- Alessandro, Pietro di1
- Alfonso V, King of Aragon, 1396-14581
- Allegory1
- Almanach perpetuum celestium motuum (Zacuto, Abraham ben Samuel)1