Encyclopedias, Almanacs, Transcripts, and Maps
- 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
- Arnáiz Barón, Rafael, Bl.
- Arnaldo of Villanova°
- Arnaldus Amalrici
- Arnauld
- Arndt, Adolf
- Arndt, Ernst Moritz°
- Arnheim, Fischel
- Arnheim, Heymann
- Arnobius the Elder