- Alban, Saint, -304?1
- Albums1
- Alchemy--Bibliography1
- Alcuin, 735-804. Correspondence1
- Alexander III, Pope, -11811
- Alexander, de Villa Dei. Doctrinale puerorum1
- Alfonso V, King of Aragon, 1396-14581
- Almanach perpetuum celestium motuum (Zacuto, Abraham ben Samuel)1
- Ambassadors1
- Ambrose, Saint, Bishop of Milan, -3971
- America1
- Andria (Terence)1
- Angels1
- Angels--Christianity1
- Angels--History of doctrines1
- Animals1
- Anne (Mother of the Virgin Mary), Saint1
- Anthony, of Egypt, Saint, approximately 250-355 or 3561
- Anthony, of Padua, Saint, 1195-1231--Prayers and devotions1
- Anti-Catholicism1