- Adrian VI, Pope, 1459-15231
- Advent sermons1
- Advent--Liturgy1
- Aegidius, Saint, Abbot1
- Aesop's fables1
- Agamemnon, King of Mycenae (Mythological character)1
- Agazaria, Claudio Boncompagni di1
- Agnes, Saint, Martyr1
- Agreda, Dominici d'1
- Alban, Saint, -304?1
- Albertus de Fontanella1
- Albigenses1
- Albizzi, Costanza1
- Albums (Books)1
- Alchemy--Bibliography1
- Alcuin, 735-8041
- Alcuin, 735-804. Correspondence1
- Aldobrandini, Giovanni degli1
- Aleramo, Marquis of Monferrato, -9671
- Alessandri, Alessandro degli1