- Anthony, of Egypt, Saint, approximately 250-355 or 3561
- Anthony, of Padua, Saint, 1195-12311
- Anthropomorphic letters1
- Antiphonaries (Service books)1
- Antiphons (Music)1
- Antiquities1
- Apocalpytic literature1
- Apocryphal and legendary literature1
- Apollonius, of Tyana1
- Apologetic writings1
- Apostles in art1
- Aqueducts1
- Arbalet, Jean1
- Architecture1
- Architecture--Orders1
- Argonauts (Greek mythology)1
- Arithmetic--Study and teaching1
- Arnaldus, de Villanova, -13111
- Arrighi family1
- Arrigucci family1