Encyclopedias, Almanacs, Transcripts, and Maps
- Apollonia
- Apollonia of Alexandria, St.
- Apollonius Molon°
- Apollonius°
- Apologetics, History of
- Apologies, Liturgical
- Apologists, Greek
- Apolotsky, Hans Jacob
- Apophatic Theology
- Apophthegmata Patrum
- Apor, Vilmos, Bl.
- Aporia
- Apostles of Jesus
- Apostles' Creed
- Apostles, Iconography of
- Apostleship of Prayer
- Apostleship of the Sea
- Apostolate and Spiritual Life
- Apostolic Blessing
- Apostolic Camera