Encyclopedias, Almanacs, Transcripts, and Maps
- Ark of Moses
- Ark of Noah
- Ark of the Covenant
- Ark of the Covenant
- Arkansas, Catholic Church in
- Arkin, Alan W.
- Arlegui, José
- Arlosoroff, Chaim
- Armada, The Spanish
- Armagh, Primatial See of
- Armellini, Mariano
- Armenia, Martyrs of, Bb.
- Armenia, The Catholic Church in
- Armenian Christianity
- Armenian Liturgy
- Armenians, Decree for
- Armentia, Nicolás
- Armilus
- Armistice Agreements, Israel-Arab
- Armleder