- Adrian VI, Pope, 1459-15231
- Agreda, Dominici d'1
- Alban, Saint, -304?1
- Albigenses1
- Albizzi, Costanza1
- Alchemy--Bibliography1
- Alexander, de Villa Dei. Doctrinale puerorum1
- Alexander, the Great, 356 B.C.-323 B.C--Romances1
- Alfonso V, King of Aragon, 1396-14581
- Almanacs1
- Ambassadors1
- Ambrose, Saint, Bishop of Milan, -3971
- Amelius, Martyr1
- Amicus, Martyr1
- Andria (Terence)1
- Annals and chronicles1
- Anne (Mother of the Virgin Mary), Saint1
- Antiphonaries (Service books)1
- Antiphons (Music)1
- Apollonius, of Tyana1