- Andrea, Michele di1
- Andreucci, Bartolomeo1
- Andria (Terence)1
- Andronicus II Palaeologus, Emperor of the East, 1260-13321
- Angelio family1
- Angels1
- Angulo family1
- Angulo, Alonso de1
- Anjou, François, duc d', 1554-15841
- Annibale, di Capua, approximately 1544-15951
- Annunciation to the Blessed Virgin Mary1
- Anti-Catholicism1
- Anti-clericalism1
- Antiphons (Music)1
- Apocryphal and legendary literature1
- Apollonius, of Tyana1
- Apostasy--Catholic Church1
- Aqueducts1
- Arabic alphabet1
- Arabic alphabet--Religious aspects--Islam1