Aachen , in French, Aix-la-Chapelle, the name by which the city is generally known in Latin Aquæ Grani, later Aquisgranum, is the capital of a presid

 Aaron

 Abaddon

 Abandonment

 Pedro Abarca

 Abarim

 Abba

 Antoine d'Abbadie

 Abban

 Abbé

 Jean Baptiste Abbeloos

 Abbess

 Abbey

 Abbo Cernuus

 St. Abbon

 Abbot

 Henry Abbot

 Methods of Abbreviation

 Ecclesiastical Abbreviations

 Abbreviators

 Abdera

 Abdias

 Abdias of Babylon

 Abdication

 Sts. Abdon and Sennen

 Abduction

 Abecedaria

 Abecedarians

 Abel (1)

 Abel (2)

 Peter Abelard

 Louis Abelly

 Abenakis

 Abraham-ben-Méir Aben-Ezra

 Inscription of Abercius

 John Abercromby

 Robert Abercromby

 Diocese of Aberdeen

 University of Aberdeen

 Moritz von Aberle

 Legend of Abgar

 Abiathar

 Abila

 Abbey of Abingdon

 Thomas Abington

 Missions among the Abipones

 Abisai

 Abjuration

 Abo

 Abner

 Abomination of Desolation

 Abortion

 Physical Effects of Abortion

 Charles François d'Abra de Raconis

 Don Isaac Abrabanel

 Abraham

 Abraham (in Liturgy)

 Bosom of Abraham

 Abraham a Sancta Clara

 Abraham Ecchelensis

 Abrahamites

 Nicholas Abram

 Abrasax

 Absalom

 Absalon of Lund

 Absinthe

 Absolute

 Absolution

 Abstemii

 Abstinence

 Physical Effects of Abstinence

 Abstraction

 Abthain

 Theodore Abucara

 Abundius

 Abydus

 Abyss

 Abyssinia

 Acacia

 Acacians

 Acacius, Bishop of Beroea

 Acacius, Bishop of Caesarea

 Acacius, Patriarch of Constantinople

 St. Acacius

 Roman Academies

 French Academy

 Acadia

 Acanthus (see)

 Acanthus (plant)

 Acathistus

 St. Acca

 Accaron

 Accentus Ecclesiasticus

 Acceptance

 Acceptants

 Accession

 Diocese of Arras

 Councils of Arras

 Pablo José Arriaga

 Juan Arricivita

 Nicola Arrighetti

 Nicolò Arrighetti

 Arsacidæ

 Arsenius Autorianos

 St. Arsenius

 Arsinoe

 Accessus

 Artemon

 James Arthur

 Thomas Arthur

 Articles of Faith

 Organic Articles

 Artoklasia

 Bachelor of Arts

 Faculty of Arts

 Master of Arts

 Seven Liberal Arts

 Acciajuoli

 Artvin

 Thomas Arundel

 Thomas Arundell

 St. Asaph

 Ascalon

 Ascelin

 Ascendente Domino

 Ascension

 Feast of the Ascension

 Asceticism

 Accident

 Joseph, Ritter von Aschbach

 Diocese of Ascoli-Piceno

 Diocese of Ascoli, Satriano, and Cirignola

 Aseity

 Aseneth

 Aser

 Asgaard

 Ash Wednesday

 George Ashby

 Thomas Ashby

 Acclamation

 Ashes

 Ven. Ralph Ashley

 John Ashton

 Ven. Roger Ashton

 Asia

 Asia Minor

 Asiongaber

 Robert Aske

 Asmodeus

 Aspendus

 Acclamation (in Papal Elections)

 Asperges

 Martin Aspilcueta

 The Ass (in Caricature of Christian Beliefs and Practices)

 Prefecture Apostolic of Assam

 Assemani

 Assemblies of the French Clergy

 John Asser

 Feast of Asses

 Assessor of the Holy Office

 Assessors

 Biblical Accommodation

 St. Assicus

 Assideans

 Physiological Assimilation

 Psychological Assimilation

 Diocese of Assisi

 Assistant at the Pontifical Throne

 Assize of Clarendon

 Volume 1

 Volume 3

 Assizes of Jerusalem

 Accomplice

 Ignaz Assmayer

 Right of Voluntary Association

 Association of Ideas

 Association of Priestly Perseverance

 Pious Associations

 Assuerus

 Little Sisters of the Assumption

 Sisters of the Assumption

 Feast of the Assumption of the Blessed Virgin Mary

 Assur (1)

 Francesco Accursius

 Assur (2)

 Assyria

 Asterisk

 Asterius

 Diocese of Asti

 Aston

 Diocese of Astorga

 Astrology

 Astronomy

 Astronomy in the Bible

 Paul-Thérèse-David d'Astros

 Acephali

 Jean Astruc

 Atahuallpa

 Juan Santos Atahualpa

 Atavism

 Vicariate Apostolic of Athabasca

 Athanasian Creed

 St. Athanasius

 Atheism

 Abbey of Athelney

 Athenagoras

 Archdiocese of Acerenza

 Athenry

 Christian Athens

 Modern Diocese of Athens

 Joseph Athias

 Mount Athos

 Juan de Atienza

 James Atkinson

 Nicholas Atkinson

 Paul Atkinson of St. Francis

 Sarah Atkinson

 Achab

 Ven. Thomas Atkinson

 Atom

 Atomism

 Day of Atonement

 Doctrine of the Atonement

 Atrib

 Atrium

 Attainder

 St. Attala

 Attalia

 Achaia

 Michael Attaliates

 Atticus

 Councils of Attigny

 Attila

 Jean Denis Attiret

 Atto

 Atto of Pistoia

 Atto of Vercelli

 St. Attracta

 Divine Attributes

 Achaicus

 Attrition

 Attuda

 Jean-Michel-d'Astorg Aubarède

 Jean-Antoine d'Aubermont

 Joseph Aubery

 François Hédelin, Abbé d'Aubignac

 Pierre d'Aubusson

 Archdiocese of Auch

 Diocese of Auckland

 Auctorem Fidei

 Achaz

 Pontifical Audiences

 Giovanni Battista Audiffredi

 J. M. Vincent Audin

 Guglielmo Audisio

 Auditor

 Audran

 Leopold Auenbrugger

 Jobst Bernhard von Aufsees

 Edmond Auger

 Augilæ

 Lucas d'Achéry

 Diocese of Augsburg

 Synods of Augsburg

 Augusta

 Augustin von Alfeld

 Rule of Saint Augustine

 St. Augustine of Canterbury

 St. Augustine of Hippo

 Teaching of St. Augustine of Hippo

 Works of St. Augustine of Hippo

 Augustinians of the Assumption

 Antonius Augustinus

 Augustinus-Verein

 Achiacharus

 Augustopolis

 Augustus

 Aumbry

 St. Aunarius

 Aurea

 Aurelian

 Aureliopolis

 Aurelius

 Marcus Aurelius Antoninus

 Petrus Aureoli

 Achimaas

 Auriesville

 Giovanni Aurispa

 Aurora Lucis Rutilat

 Ausculta Fili

 Decimus Magnus Ausonius

 John Austin

 Australia

 St. Austrebertha

 St. Austremonius

 Austro-Hungarian Monarchy

 Achimelech

 Authentic

 Authenticity of the Bible

 Civil Authority

 Authorized Version

 Autocephali

 Autos Sacramentales

 Ambrose Autpert

 Joseph Autran

 Diocese of Autun

 Auxentius

 Achitopel

 Councils of Auxerre

 Auxiliary Bishop

 Auxilius of Naples

 Ava

 Nicola Avancini

 Avarice

 Avatār

 Pierre du Bois, Baron d'Avaugour

 Ave Maris Stella

 Ave Regina

 Diocese of Achonry

 Diocese of Avellino

 Avempace

 Fernando Avendano

 Averroes

 Diocese of Aversa

 Avesta

 Theological Aspects of Avesta

 Avicebron

 Avicenna

 Avignon

 Achor Valley

 University of Avignon

 Diocese of Avila

 Francisco de Avila

 Sancho de Avila

 St. Avitus

 Order of Aviz

 Council of Avranches

 Philippe Avril

 Axum

 Diocese of Ayacucho

 Achrida

 Fray Francisco de Ayeta

 Lucas Vásquez de Ayllón

 James Ambrose Dominic Aylward

 Aymará

 Aymeric of Piacenza

 Féliz de Azara

 Aristaces Azaria

 Brother Azarias

 Luiz de Azevedo

 Juan Azor

 Johann Heinrich Achterfeldt

 Azores

 Azotus

 Aztecs

 Azymes

 Azymites

 Theodore William Achtermann

 Valens Acidalius

 Diocese of Aci-Reale

 Leopold Ackermann

 Acmonia

 Acoemetae

 Acolouthia

 Acolyte

 Joaquín Acosta

 José de Acosta

 Diocese of Acquapendente

 Acquaviva

 Claudius Acquaviva

 Diocese of Acqui

 Acre

 Acrostic

 Acta Pilati

 Acta Sanctæ Sedis

 Acta Sanctorum Hiberniæ

 Acta Triadis Thaumaturgæ

 Act of Settlement (Irish)

 Charles Januarius Acton

 John Acton

 John Emerich Edward Dalberg Acton, Baron Acton

 John Francis Edward Acton

 Canonical Acts

 Human Acts

 Indifferent Acts

 Acts of the Apostles

 Acts of Roman Congregations

 Actus et Potentia

 Actus primus

 Actus Purus

 Acuas

 St. Adalard

 Adalbert

 Adalbert I

 St. Adalbert (of Bohemia)

 St. Adalbert (of Germany)

 Ad Apostolicae Dignitatis Apicem

 Ad Limina Apostolorum

 Ad Sanctam Beati Petri Sedem

 Ad Universalis Ecclesiae

 Adam

 Adam in Early Christian Liturgy and Literature

 Books of Adam

 Adam of Bremen

 Adam of Fulda

 Adam of Murimuth

 Adam of Perseigne

 Adam of St. Victor

 Adam of Usk

 John Adam

 Nicholas Adam

 Adam Scotus

 Andrea Adami da Bolsena

 Adamites

 St. Adamnan

 James Adams

 Ven. John Adams

 Diocese of Adana

 Adar

 Ferdinando d'Adda

 Addas

 Liturgy of Addeus and Maris

 Ecclesiastical Addresses

 Archdiocese of Adelaide

 St. Adelaide, Abbess

 St. Adelaide (Adelheid)

 John Placid Adelham

 Adelmann

 Adelophagi

 Vicariate Apostolic of Aden

 Adeodatus

 Pope St. Adeodatus

 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

 Diocese of Adria

 Pope Adrian I

 Pope Adrian II

 Pope St. Adrian III

 Pope Adrian IV

 Pope Adrian V

 Pope Adrian VI

 St. Adrian of Canterbury

 Adrian of Castello

 Adrianople

 Christian Kruik van Adrichem

 Adso

 Diego Francisco Aduarte

 Adullam

 Adulteration of Food

 Adultery

 Advent

 Adventists

 Book of Advertisements

 Advocates of Roman Congregations

 Advocates of St. Peter

 Advocatus Diaboli

 Advocatus Ecclesiæ

 Advowson

 Adytum

 St. Aedan of Ferns

 Aedh of Kildare

 Bl. Aegidius of Assisi

 Ægidius of Viterbo

 Aelfric, Abbot of Eynsham

 Ælnoth

 St. Ælred

 Æneas of Gaza

 St. Aengus (the Culdee)

 Ænon

 Æons

 Aër

 Aërius of Pontus

 Æsthetics

 Æterni Patris (Pius IX)

 Æterni Patris (Leo XIII)

 Aëtius

 Affinity (in the Bible)

 Affinity (in Canon Law)

 Affirmation

 Afflighem

 Denis Auguste Affre

 St. Afra

 Africa

 Early African Church

 African Liturgy

 African Synods

 Agabus

 Agape

 Agapetae

 Agapetus

 Pope St. Agapetus I

 Pope Agapetus II

 William Seth Agar

 St. Agatha

 Agathangelus

 Agathias

 Pope St. Agatho

 Agaunum

 Agostini Agazzari

 Council of Agde

 Canonical Age

 Age of Reason

 Diocese of Agen

 Agents of Roman Congregations

 Aggeus (Haggai)

 Unjust Aggressor

 Raymond d'Agiles

 St. Agilulfus

 Agios O Theos

 Giuseppe Agnelli

 Fra Guglielmo Agnelli

 Bl. Agnellus of Pisa

 Andreas Agnellus of Ravenna

 St. Agnes of Assisi

 Bl. Agnes of Bohemia

 St. Agnes of Montepulciano

 St. Agnes of Rome

 Maria Gaetana Agnesi

 Agnetz

 Agnoetae

 Agnosticism

 Agnus Dei

 Agnus Dei (in Liturgy)

 Agonistici

 Agony of Christ

 Paolo Agostini

 Bl. Agostino Novello

 Charles Constance César Joseph Matthieu d'Agoult

 Archdiocese of Agra

 Agram

 Agrapha

 Agrarianism

 Maria de Agreda

 Agria

 St. Agricius

 Alexander Agricola

 George Agricola

 Rudolph Agricola

 Heinrich Cornelius Agrippa of Nettesheim

 Agrippinus

 Diocese of Aguas Calientes

 Joseph Saenz de Aguirre

 Ahicam

 Ahriman and Ormuzd

 Johann Caspar Aiblinger

 Gregor Aichinger

 St. Aidan of Lindisfarne

 Duchess of Aiguillon

 Mary Aikenhead

 St. Ailbe

 St. Aileran

 Family of d'Ailleboust

 Pierre d'Ailly

 Mateo Aimerich

 Diocese of Aire

 Giacomo Maria Airoli

 Aisle

 Aistulph

 Archdiocese of Aix

 Councils of Aix-en-Provence

 Diocese of Ajaccio

 Akhmin

 Michael and Nicetas Akominatos

 Alabama

 Alabanda

 Alabaster

 Diocese of Alagoas

 Pietro Alagona

 Alain de l'Isle

 Alalis

 Lucas Alaman

 Niccolò Alamanni

 Alan of Tewkesbury

 Alan of Walsingham

 Alanus de Rupe

 Alaska

 Diocese of Alatri

 Alb

 Diocese of Alba Pompeia

 St. Alban

 Albanenses

 Albania

 Albani

 Albano

 Diocese of Albany

 Diocese of Albenga

 Niccolo Albergati

 Alberic of Monte Cassino

 Alberic of Ostia

 Albero de Montreuil

 Giulio Alberoni

 Albert

 Albert II

 Bl. Albert

 St. Albert

 Bl. Albert Berdini of Sarteano

 Albert of Aachen

 Albert of Brandenburg

 Albert of Castile

 Albert of Stade

 Leandro Alberti

 Leone Battista Alberti

 Nicolò Albertini

 John Baptist Albertrandi

 Bl. Albertus Magnus

 Archdiocese of Albi

 Council of Albi

 Juan de Albi

 Sigismund Albicus

 Albigenses

 Albinus

 Johann G. Albrechtsberger

 Albright Brethren

 Afonzo de Albuquerque

 University of Alcalá

 Military Order of Alcántara

 Antonio de Alcedo

 Alchemy

 St. Alcmund

 Andrea Alciati

 Alcimus

 John Alcock

 Alcoholism

 Alcuin

 St. Aldegundis

 Aldersbach

 Aldfrith

 St. Aldhelm

 St. Aldric

 Ulissi Aldrovandi

 Leonard Alea

 Phillipe Alegambe

 Francisco Xavier Alegre

 Joseph Sadoc Alemany

 Giulio Alenio

 Archdiocese of Aleppo

 Diocese of Ales and Terralba

 Diocese of Alessandria della Paglia

 Galeazzo Alessi

 Diocese of Alessio

 Alexander

 Alexander (Early Bishops)

 Pope St. Alexander I

 Pope Alexander II

 Pope Alexander III

 Pope Alexander IV

 Pope Alexander V

 Pope Alexander VI

 Pope Alexander VII

 Pope Alexander VIII

 St. Alexander

 St. Alexander (II)

 St. Alexander (of Alexandria)

 Bl. Alexander Briant

 Alexander Natalis

 Alexander of Abonoteichos

 Alexander of Hales

 Alexander of Lycopolis

 Bl. Alexander Sauli

 Dom Jacques Alexandre

 Alexandria

 Councils of Alexandria

 Church of Alexandria

 Diocese of Alexandria

 Alexandrian Library

 Alexandrine Liturgy

 Alexian Nuns

 Alexians

 St. Alexis Falconieri

 St. Alexius

 Count Vittorio Alfieri

 Pietro Alfieri

 Alfonso de Zamora

 Alfonso of Burgos

 Michael Alford

 Alfred the Great

 St. Alfrida

 St. Alfwold

 Alger of Liége

 Diocese of Alghero

 Archdiocese of Algiers

 Algonquins

 Diocese of Alife

 Alimentation

 Alimony

 Aliturgical Days

 All Hallows College

 All Saints

 All Souls' Day

 Allah

 Diocese of Allahabad

 Paul Allard

 Leo Allatius

 Joseph Allegranza

 Antonio Allegri

 Gregorio Allegri

 Alleluia

 Jean Allemand

 Edward Patrick Allen

 Frances Allen

 George Allen

 John Allen (I)

 John Allen (II)

 William Allen

 August Allerstein

 Thomas William Allies

 Joseph Franz Allioli

 William Allison

 Allocution

 Allori

 William Allot

 Claude Allouez

 Alma

 Alma Redemptoris Mater

 Diego de Almagro

 John Almeida

 Diocese of Almeria

 Camillo Almici

 Ven. John Almond

 John Almond

 Oliver Almond

 Alms and Almsgiving

 St. Alnoth

 Alogi

 St. Aloysius Gonzaga

 A and Ω

 Alpha and Omega (in Jewish Theology)

 Christian Use of the Alphabet

 St. Alphonsus Liguori

 St. Alphonsus Rodriguez

 Prospero Alpini

 Alsace-Lorraine

 Diego Francisco Altamirano

 Altamura and Acquaviva

 Altar (in Liturgy)

 Altar (in the Greek Church)

 Altar (in Scripture)

 History of the Christian Altar

 Bl. Altmann

 St. Alto

 Diocese of Alton

 Diocese of Altoona

 Altruism

 Alumnus

 Niccolò Alunno

 Fernando Alvarez de Toledo, Duke of Alva

 Pedro d'Alva y Astorga

 Alonzo de Alvarado

 Fray Francisco de Alvarado

 Pedro de Alvarado

 Balthazar Alvarez

 Diego Alvarez

 Manoel Alvarez

 Alvarez de Paz

 St. Alypius

 José Antonio Alzate

 Johann Baptist Alzog

 Ama

 Giovanni Antonio Amadeo

 Dioceses of Amadia and Akra

 Amalarius of Metz

 St. Amalberga (1)

 St. Amalberga (2)

 Amalec

 Archdiocese of Amalfi

 Amalricians

 Amalricus Augerii

 St. Amandus

 Amasia

 Amastris

 Thaddeus Amat

 Amathus

 Diocese of Amazones

 Peter Ambarach

 Ambition

 Ambo

 Ambo (in the Russian and Greek Church)

 George d'Amboise

 Our Lady of Ambronay

 August Wilhelm Ambros

 St. Ambrose

 St. Ambrose of Camaldoli

 Bl. Ambrose of Sienna

 Ambrosian Basilica

 Ambrosian Chant

 Ambrosian Hymnography

 Ambrosian Library

 Ambrosian Liturgy and Rite

 Ambrosians

 Ambrosiaster

 Ambulatory

 Diocese of Amelia

 Denis Amelote

 Amen

 Amende Honorable

 Veit Amerbach

 America

 Pre-Columbian Discovery of America

 American College in Rome

 American College at Louvain

 South American College

 American Protective Association

 Francis Kerril Amherst

 Ven. John Amias

 Amice

 Antonio Amico

 Francesco Amico

 Diocese of Amida

 Diocese of Amiens

 Joseph Maria Amiot

 Amisus

 Daniel Ammen

 St. Ammon

 Ammon

 Ammonian Sections

 Ammonites

 Amorbach

 Amorios

 Amorrhites

 Eusebius Amort

 Amos

 Amovibility

 Vicariate Apostolic of Amoy

 André Marie Ampère

 Amphilochius of Iconium

 Amphilochius of Sida

 Amphoræ

 Abbey of Ampleforth

 Ampullæ

 Diocese of Ampurias

 Amra

 Amrah

 Amraphel

 Amsterdam

 Amulet

 Use and Abuse of Amulets

 Amyclae

 Jacques Amyot

 Anabaptists

 Pope St. Anacletus

 Anacletus II

 Anæsthesia

 Diocese of Anagni

 Analogy

 Analysis

 Anaphora

 Anarchy

 St. Anastasia

 Anastasiopolis

 St. Anastasius (1)

 Pope St. Anastasius I

 Pope Anastasius II

 Pope Anastasius III

 Pope Anastasius IV

 St. Anastasius (2)

 St. Anastasius Sinaita

 Anathema

 Anathoth

 St. Anatolia

 St. Anatolius (1)

 St. Anatolius (2)

 Anatomy

 Anazarbus

 Pedro de Añazco

 Joseph Anchieta

 Anchor

 Anchorites

 Ancient of Days

 Ancilla Dei

 Ciriaco d'Ancona

 Diocese of Ancona and Umana

 Ancren Riwle

 Ancyra

 Councils of Ancyra

 Andalusia

 William Henry Anderdon

 Anthony Maria Anderledy

 Henry James Anderson

 Lionel Albert Anderson

 Patrick Anderson

 James Anderton

 Ven. Robert Anderton

 Roger Anderton

 Thomas Anderton

 Heinrich Bernhard, Freiherr von Andlaw

 Ven. William Andleby

 Alonso Andrada

 Antonio de Andrada

 Diego Andrada de Payva

 Bernard André

 Yves Marie André

 Giovanni d'Andrea

 Bl. Andrea Dotti

 Andrea Pisano

 Andreas of Ratisbon

 Felix de Andreis

 Juan Andres

 St. Andrew (1)

 St. Andrew (2)

 St. Andrew Avellino

 Bl. Andrew Bobola

 St. Andrew Corsini

 Andrew of Caesarea

 St. Andrew of Crete

 Andrew of Lonjumeau

 Andrew of Rhodes

 St. Andrew the Scot

 William Eusebius Andrews

 Diocese of Andria

 Anemurium

 Felice Anerio

 Giovanni Francesco Anerio

 Filippo Anfossi

 Ange de Saint Joseph

 Ange de Sainte Rosalie

 Angel

 St. Angela Merici

 Bl. Angela of Foligno

 Francesco degli Angeli

 Girolamo degli Angeli

 Angelicals

 Fra Angelico

 Bl. Angelo Carletti di Chivasso

 Angelo Clareno da Cingoli

 Early Christian Representations of Angels

 Angels of the Churches

 Angelus

 Angelus Bell

 Angelus Silesius

 Anger

 Diocese of Angers

 University of Angers

 Notre Dame des Anges

 St. Angilbert

 Francesco Angiolini

 Priory of Anglesea

 Anglican Orders

 Anglicanism

 Timothy Warren Anglin

 Anglo-Saxon Church

 Anglona-Tursi

 Angola and Congo

 Diocese of Angora

 Diocese of Angoulême

 Diocese of Angra

 Pedro Angulo

 Vicariate Apostolic of Anhalt

 Pope St. Anicetus

 College and Church of the Anima (in Rome)

 Anima Christi

 Animals in Christian Art

 Animals in the Bible

 Animism

 Giovanni Animuccia

 Anise

 Anna

 Anna Comnena

 Ecclesiastical Annals

 Annas

 François Annat

 Annates

 St. Anne

 Sainte Anne d'Auray

 Sainte Anne de Beaupré

 Diocese of Annecy

 Joseph Annegarn

 Annibale d'Annibaldi

 Giuseppe d'Annibale

 Annius of Viterbo

 St. Anno

 Annunciation of the Blessed Virgin Mary

 Feast of the Annunciation of the Blessed Virgin Mary

 Orders of the Annunciation

 Louis-Pierre Anquetil

 Casto Innocenzio Ansaldi

 Giordano Ansaloni

 St. Anschar

 Councils of Anse

 Ansegisus

 St. Ansegisus

 St. Anselm (1)

 St. Anselm (2)

 Anselm of Laon

 Anselm of Liège

 St. Anselm of Lucca, the Younger

 Antoine Anselme

 Reyer Anslo

 Thomas Chisholm Anstey

 Antediluvians

 Pope St. Anterus

 Joseph Anthelmi

 Anthemius

 St. Anthony

 Orders of Saint Anthony

 St. Anthony of Padua

 Anthony of Sienna

 Anthony of the Mother of God

 Anthropomorphism

 Antichrist

 Antidicomarianites

 Antidoron

 Diocese of Antigonish

 Antimensium

 Antinoe

 Antinomianism

 Church of Antioch

 Antioch

 Antiochene Liturgy

 Antiochus of Palestine

 Antipater of Bostra

 Antipatris

 Antiphellos

 Antiphon

 Antiphon (in the Greek Church)

 Antiphon (in Greek Liturgy)

 Antiphonary

 Gregorian Antiphonary

 Antipodes

 Antipope

 Archdiocese of Antivari

 Vicariate Apostolic of Antofogaste

 Paul Gabriel Antoine

 Anton Ulrich

 Giacomo Antonelli

 Leonardo Antonelli

 Nicolò Maria Antonelli

 Giovanni Antoniano

 Silvio Antoniano

 Charles Antoniewicz

 St. Antoninus

 Antoninus Pius

 St. Antonio Maria Zaccaria

 Maria Antonio of Vicenza

 Antonius

 Franz Joseph Antony

 Antwerp

 Fray Domingo de la Anunciación

 Fray Juan de la Anunciación

 Diocese of Aosta

 Apaches

 Apameia

 Antonio Aparisi y Guijarro

 Apelles

 St. Aphian

 Aphraates

 Apiarius of Sicca

 Apocalypse

 Apocatastasis

 Apocrisiarius

 Apocrypha

 Apodosis

 Apollinarianism

 St. Apollinaris (1)

 St. Apollinaris (2)

 Apollinaris (the Elder)

 St. Apollinaris Claudius

 St. Apollonia

 Apollonius of Ephesus

 Apologetics

 Apolysis

 Apolytikion

 Apophthegmata Patrum

 Ferrante Aporti

 Apostasy

 Apostle (in Liturgy)

 Apostle Spoons

 Apostles

 Apostles' Creed

 Twelve Apostles of Erin

 Apostleship of Prayer

 Apostolic Camera

 Apostolic Churches

 Apostolic Church-Ordinance

 Apostolic Constitutions

 Apostolic Fathers

 Apostolic Letters

 Apostolic Majesty

 Apostolic See

 Apostolic Succession

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 Apostolicae Curae

 Apostolicae Sedis Moderationi

 Apostolicæ Servitutis

 Apostolici

 Apostolici Ministerii

 Apostolici Regiminis

 Apostolicity

 Apostolicum Pascendi Munus

 Apotactics

 Apotheosis

 Apparitor

 Appeal as from an abuse

 Appeals

 Appetite

 Approbation

 Appropriation

 Apse

 Apse Chapel

 Apsidiole

 Council of Apt

 Aquarians

 Archdiocese of Aquila

 Aquila and Priscilla

 Aquileia

 Councils of Aquileia

 Diocese of Aquino, Sora, and Pontecorvo

 Arabia

 Vicariate Apostolic of Arabia

 Councils of Arabia

 Arabian School of Philosophy

 Arabici

 Arabissus

 Arad

 Monastic School of Aran

 Council of Aranda

 Philip Aranda

 Arason Jón

 Arator

 Prefecture Apostolic of Araucania

 Araucanians

 Antonio de Araujo

 Francisco de Araujo

 Arawaks

 Ignacio de Arbieto

 Arbitration

 St. Arbogast

 Abbey of Arbroath

 Missal of Arbuthnott

 Arca

 Our Lady of Arcachon

 Jacob Arcadelt

 Arcadiopolis

 Arcae

 Arcanum

 Arch

 Commission of Sacred Archæology

 Archange de Lyon

 Archbishop

 Archconfraternity

 Archdeacon

 Richard Archdeacon

 Archdiocese

 Archelais

 James Archer

 Court of Arches

 Archiereus

 Archimandrite

 Filippo Archinto

 Ecclesiastical Archives

 Archontics

 Archpriest

 Arcosolium

 Arculf

 Diocese of Ardagh

 Ardbraccan

 Priory of Ardchattan

 Edward Arden

 Notre Dame des Ardilliers

 Prince Charles d'Aremberg

 Areopagus

 Areopolis

 Diocese of Arequipa

 Arethas of Caesarea

 Arethusa

 Faustino Arévalo

 Rodríguez Sanchez de Arévalo

 Diocese of Arezzo

 Pierre de Voyer d'Argenson

 Argentine Republic

 Charles du Plessis d'Argentré

 Argos

 Luis Antonio Argüello

 Diocese of Argyll and the Isles

 John Argyropulos

 St. Arialdo

 Arianism

 Diocese of Ariano

 Francis Arias

 Pedro Arias de Avila

 Benedictus Arias Montanus

 Ariassus

 Aribo

 Arindela

 Ludovico Ariosto

 Aristeas

 Aristides

 Aristotle

 Arius

 Arizona

 Ark

 Arkansas

 Fray José Arlegui

 Synods of Arles

 Spanish Armada

 Archdiocese of Armagh

 Book of Armagh

 School of Armagh

 Georges d'Armagnac

 Mariano Armellino

 Armenia

 Armenierstadt

 Fray Nicolás Armentia

 Diocese of Armidale

 Arminianism

 Arnauld

 Thomas Augustine Arne

 Arni Thorlaksson

 Arnobius

 Arnold

 Arnold of Brescia

 Alberto Arnoldi

 Bartholomäus Arnoldi

 Arnolfo di Cambio

 Peter Joseph Arnoudt

 Veit Arnpeck

 Arnulf of Bavaria

 Arnulf of Lisieux

 St. Arnulf of Metz

Diocese of Aversa


Comprising twenty-one towns in the Province of Caserta and twelve in the Province of Naples, it is under the immediate jurisdiction of the Holy See. This city is of relatively recent origin. It arose in the eleventh century on the ruins of Atella, a city of the Oscians, famous for their piquant raillery, which furnished the basis for the licentious interludes called Atellanoe. The ruins of ancient Atella, destroyed during the invasions of the barbarians, are still to be seen in the neighbourhood of Arpino. On these ruins the Norman Duke, Robert Guiscard, built a fortification which in time became a city called Aversa. The same Duke Robert, becoming a vassal of the pope and supporting him in his struggle with the emperor, obtained permission from Leo IX to have the Bishopric of Atella transferred to Aversa. The city has many fine monuments in the Norman style. It contains 54 parishes; 177 churches, chapels, and oratories; 674 secular clergy, and a population of 130,100.

ERNESTO BUONAIUTI