- Anne (Mother of the Virgin Mary), Saint1
- Annunciation to the Blessed Virgin Mary1
- Anselm, Saint, Archbishop of Canterbury, 1033-11091
- Anthony, of Padua, Saint, 1195-1231--Prayers and devotions1
- Anticlaudianus (Alanus, de Insulis)1
- Antiphonaries--Manuscripts1
- Antonio Magistri1
- Apocryphal Gospels1
- Apocryphal and legendary literature1
- Apocryphal books1
- Apocryphal books (New Testament)1
- Apparitions1
- Arbalet, Jean1
- Arithmetic--Study and teaching1
- Armies1
- Armorial bindings1
- Armorial stamps1
- Artedo, Petrus de1
- Astrolabes1
- Astrology, Arab1