Encyclopedias, Almanacs, Transcripts, and Maps
- Athanasius, St.
- Athelney, Abbey of
- Athelstan, King of England
- Athenagoras
- Athenagoras I
- Athens, Schools of
- Athias, Joseph and Immanuel
- Athlit
- Athribis
- Athronges
- Atienza, Juan de
- Atil or Itil
- Atisha
- Atkinson, Matthew (Paul of St. Francis)
- Atkinson, Thomas, Bl.
- Atlan, Henri
- Atlan, Jean
- Atlanta, Archdiocese of
- Atlantic Canada
- Atlas, David