- Annunciation to the Blessed Virgin Mary1
- Anselm, Saint, Archbishop of Canterbury, 1033-11091
- Antella, Francesco dell'1
- Anthony, of Padua, Saint, 1195-12313
- Anthony, of Padua, Saint, 1195-1231--Prayers and devotions1
- Anthropomorphic initials1
- Anthropomorphic letters3
- Anti-Catholicism1
- Anti-clericalism1
- Antichrist3
- Anticlaudianus (Alanus, de Insulis)1
- Antiphonaries315
- Antiphonaries (Service books)36
- Antiphonaries--Manuscripts1
- Antiphons (Music)4
- Antiquities1
- Antoni, Jacopo1
- Antonio Magistri1
- Antonio, Giuliano di1
- Antonio, Lorenzo di1