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Aër Aëris of Pontus Aëtius Pedro de Añazco Aachen Ancient See of Aarhus in Denmark Aaron Sts. Maris, Martha, Audifax, and Abachum Abaddon Abandonment Pedro Abarca Abarim Abbé Abba Antoine and Arnauld d'Abbadie St. Abban of Magheranoidhe St. Abban of New Ross St. Abban the Hermit Jean Baptiste Abbeloos Abbess Abbey Abbo Cernuus St. Abbon Abbot Commendatory Abbot Henry Abbot Lay Abbot Methods of Abbreviation Ecclesiastical Abbreviations Abbreviators Abdera Abdias Abdias of Babylon Abdication Sts. Abdon and Sennen Abduction Abecedaria Abecedarians Abel Abel Bl. Thomas Abel Peter Abelard Louis Abelly Abraham-ben-Méir Aben-Ezra Abenakis Inscription of Abercius John Abercromby Robert Abercromby The Diocese of Aberdeen The University of Aberdeen Moritz von Aberle The Legend of Abgar St. Abban of New Ross Abiathar Abila The Abbey of Abingdon Thomas Abington Biogenesis and Abiogenesis Abipones Abisai Abjuration Abner The Abomination of Desolation Abortion The Physical Effects of Abortion Charles François d'Abra de Raconis Don Isaac Abrabanel Abraham Abraham (in Liturgy) Abraham a Sancta Clara Abraham Ecchelensis The Bosom of Abraham Abrahamites Nicholas Abram Abrasax Absalom Absalon of Lund Absinthe The Absolute Absolution Abstemii Abstinence Physical Effects of Abstinence Abstraction Abthain Theodore Abucara Abundius Abydus Abyss Abyssinia Acacia The Acacians Acacius Acacius Acacius St. Acacius Roman Academies The French Academy Acadia Acanthus Acanthus Acathistus St. Acca Accaron Accentus Ecclesiasticus Acceptance Acceptants Accession Accessus Acciajuoli Accident Acclamation Acclamation (in Papal Elections) Biblical Accommodation Accomplice Francesco Accursius Acephali The Archdiocese of Acerenza Lucas d'Achéry Achab Achaia Achaicus Achaz Achiacharus Sts. Nereus and Achilleus, Domitilla and Pancratius Achimaas Achimelech Achitopel The Diocese of Achonry Achor Valley Achrida Johann Heinrich Achterfeldt Theodore William Achtermann The Diocese of Aci-Reale Valens Acidalius Leopold Ackermann Acmonia Acoemetae Acolouthia Acolyte Joaquín Acosta José de Acosta Acquapendente Acquaviva Acquaviva Claudius Acquaviva Acqui Acre Ptolemais Acrostic Act of Settlement (Irish) Acta Pilati Acta Sanctæ Sedis Acta Sanctorum Hiberniae Acta Triadis Thaumaturgæ Charles Januarius Acton John Acton John Emerich Edward Dalberg Acton, Baron Acton John Francis Edward Acton Acts of Roman Congregations Acts of the Apostles Acts of the Martyrs Canonical Acts Human Acts Indifferent Acts Actual Grace Actus et Potentia Actus primus Actus Purus Acuas Ad Apostolicae Dignitatis Apicem Ad Limina Apostolorum Visit ad Limina Ad Sanctam Beati Petri Sedem Ad Universalis Ecclesiae St. Adalard Adalbert Adalbert I St. Adalbert St. Adalbert Adam Adam in Early Christian Liturgy and Literature Adam of Bremen Adam of Fulda Adam of Murimuth Adam of Perseigne Adam of St. Victor Adam of Usk Adam Scotus John Adam Nicholas Adam The Books of Adam Andrea Adami da Bolsena Adamites St. Adamnan James Adams Ven. John Adams Adana Adar Sts. Felix and Adauctus Ferdinando d'Adda Doctrine of Addai Addas Liturgy of Addeus and Maris Ecclesiastical Addresses The Archdiocese of Adelaide St. Adelaide St. Adelaide Adelard of Bath John Placid Adelham Adelmann Adelophagi Vicariate Apostolic of Aden Adeodatus Pope St. Adeodatus Pope St. Deusdedit Adeste Fideles Adjuration Administrator Administrator (of Ecclesiastical Property) Canonical Admonitions Admont St. Ado of Vienne Adonai Adonias Adoption Canonical Adoption Supernatural Adoption Adoptionism Adoration Perpetual Adoration Francis Adorno Adoro Te Devote Adria Pope Adrian I Pope Adrian II Pope St. Adrian III Pope Adrian IV St. Adrian of Canterbury Adrian of Castello Pope Adrian V Pope Adrian VI Adrianople Christian Kruik van Adrichem Adso Diego Francisco Aduarte Adullam Adulteration of Food Adultery Advent
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The Catholic Encyclopedia is the most comprehensive resource on Catholic teaching, history, and information ever gathered in all of human history. This easy-to-search online version was originally printed between 1907 and 1912 in fifteen hard copy volumes.

Catholic Encyclopedia

Designed to present its readers with the full body of Catholic teaching, the Encyclopedia contains not only precise statements of what the Church has defined, but also an impartial record of different views of acknowledged authority on all disputed questions, national, political or factional. In the determination of the truth the most recent and acknowledged scientific methods are employed, and the results of the latest research in theology, philosophy, history, apologetics, archaeology, and other sciences are given careful consideration.

No one who is interested in human history, past and present, can ignore the Catholic Church, either as an institution which has been the central figure in the civilized world for nearly two thousand years, decisively affecting its destinies, religious, literary, scientific, social and political, or as an existing power whose influence and activity extend to every part of the globe. In the past century the Church has grown both extensively and intensively among English-speaking peoples. Their living interests demand that they should have the means of informing themselves about this vast institution, which, whether they are Catholics or not, affects their fortunes and their destiny.

Copyright © Catholic Encyclopedia. Robert Appleton Company New York, NY. Volume 1: 1907; Volume 2: 1907; Volume 3: 1908; Volume 4: 1908; Volume 5: 1909; Volume 6: 1909; Volume 7: 1910; Volume 8: 1910; Volume 9: 1910; Volume 10: 1911; Volume 11: - 1911; Volume 12: - 1911; Volume 13: - 1912; Volume 14: 1912; Volume 15: 1912

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