1907 Schaff-Herzog Encylopedia of Religious Knowledge
- Aquarii
- Aquaviva, Claudio
- Aquila
- Aquila (Adler) Kasper
- Aquileia, Patriarchate and Synods
- Aquileian Creed
- Aquinas. See THOMAS AQUINAS
- Arabia
- Arabians
- Arabic Gospel of the Infancy. See APOCRYPHA, B, 1., 6
- Arakin. See TALMUD
- Aram, Arameans, and the Aramaic Language
- Arator
- Arcadius, Flavius
- Arcani, Disciplina
- Archbishop
- Archdall, Mervyn
- Archdeacon and Archpriest
- Archelaus. See HEROD AND HIS FAMILY
- Archeology, Biblical
- Archeology, Christian
- Arches, Court of
- Archevites
- Archicapellanus
- Archiereus
- Archimandrite
- Architecture, Ecclesiastical
- Architecture, Hebrew
- Archives, Ecclesiastical
- Archontici. See GNOSTICISM
- Archpresbyter. See ARCHDEACON
- Arcimboldi, Giovanni Angelo
- Areopagus. (Gk. Areios Pagos, "Mars's Hill"). See GREECE, I.
- Aretas
- Arethas
- Aretius, Benedictus
- Argentina
- Arianism
- Arias, Benedictus (called Monatus)
- Aristeas
- Aristides, Marcianus
- Aristo of Pella
- Aristobulus
- Aristotle
- Arius
- Ark of the Covenant
- Arkites
- Arles, Archbishop of
- Arles, Synods of
- Armagh, Bishopric of
- Armenia
- Arminius, Jacobus (Jakob Hermanes), and Arminianism
- Armitage, Thomas
- Army. See WAR
- Arnaud, Henri
- Arnauld
- Arndt, Augustin
- Arndt, Johann
- Arndt, Johann Friedrich Wilhelm
- Arno of Reichersbert
- Arno of Salzburg
- Arnobius
- Arnobius the Younger
- Arnold of Brescia
- Arnold, Carl Franklin
- Arnold, Gottfried
- Arnold, Matthew
- Arnold, Nikolaus
- Arnold, Thomas
- Arnoldi, Bartholomaeus
- Arnoldists. See ARNOLD OF BRESCIA
- Arnot, William
- Arnulf of Lisieux
- Arnulf, Saint, of Metz
- Arrowsmith, John
- Arsenius
- Art and Church
- Art, Hebrew
- Artaxerxes
- Artemon or Artemas
- Arthur, William
- Articles, Irish, Lambeth, Thirty-Nine, Etc. See IRISH ARTICLES, LAMBETH ARTICLES, THIRTY-NINE ARTICLES, ETC.
- Arundel, Thomas