Encyclopedias, Almanacs, Transcripts, and Maps
- Aeterna Caeli Gloria
- Aeterna Christi Munera
- Aeterne Rerum Conditor
- Aeterne Rex Altissime
- Aeterni Patris
- Aethelred II, King of England
- Afendopolo, Caleb ben Elijah
- Affligem, Abbey of
- Affonso°
- Afghani, Jamal Al-Din (1839–1897)
- Afghanistan, The Catholic Church in
- Afia, Aaron
- Afike Jehuda
- Afikim
- Afikoman
- Afra, St.
- Africa, Islam in
- Africa, North: Musical Traditions
- African American Catholics in the United States (History of)
- African American Judaism