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

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Bl. Albertus Magnus


Known as Albert the Great; scientist, philosopher, and theologian, born c. 1206; died at Cologne, 15 November 1280. He is called "the Great", and "Doctor Universalis" (Universal Doctor), in recognition of his extraordinary genius and extensive knowledge, for he was proficient in every branch of learning cultivated in his day, and surpassed all his contemporaries, except perhaps Roger Bacon (1214-94), in the knowledge of nature. Ulrich Engelbert, a contemporary, calls him the wonder and the miracle of his age: "Vir in omni scientia adeo divinus, ut nostri temporis stupor et miraculum congrue vocari possit" (De summo bono, tr. III, iv).

Albert, eldest son of the Count of Bollstädt, was born at Lauingen, Swabia, in the year 1205 or 1206, though many historians give it as 1193. Nothing certain is known of his primary or preparatory education, which was received either under the paternal roof or in a school of the neighbourhood. As a youth he was sent to pursue his studies at the University of Padua; that city being chosen either because his uncle resided there, or because Padua was famous for its culture of the liberal arts, for which the young Swabian had a special predilection. The date of this journey to Padua cannot be accurately determined. In the year 1223 he joined the Order of St. Dominic, being attracted by the preaching of Blessed Jordan of Saxony second Master General of the Order. Historians do not tell us whether Albert's studies were continued at Padua, Bologna, Paris, or Cologne. After completing his studies he taught theology at Hildesheim, Freiburg (Breisgau), Ratisbon, Strasburg, and Cologne. He was in the convent of Cologne, interpreting Peter Lombard's "Book of the Sentences", when, in 1245, he was ordered to repair to Paris. There he received the Doctor's degree in the university which, above all others, was celebrated as a school of theology. It was during this period of reaching at Cologne and Paris that he counted amongst his hearers St. Thomas Aquinas, then a silent, thoughtful youth, whose genius he recognized and whose future greatness he foretold. The disciple accompanied his master to Paris in 1245, and returned with him, in 1248, to the new Studium Generale of Cologne, in which Albert was appointed Regent, whilst Thomas became second professor and Magister Studentium (Master of Students). In 1254 Albert was elected Provincial of his Order in Germany. He journeyed to Rome in 1256, to defend the Mendicant Orders against the attacks of William of St. Amour, whose book, "De novissimis temporum periculis", was condemned by Pope Alexander IV, on 5 October, 1256. During his sojourn in Rome Albert filled the office of Master of the Sacred Palace (instituted in the time of St. Dominic), and preached on the Gospel of St. John and the Canonical Epistles. He resigned the office of Provincial in 1257 in order to devote himself to study and to teaching. At the General Chapter of the Dominicans held at Valenciennes in 1250, with St. Thomas Aquinas and Peter of Tarentasia (afterwards Pope Innocent V), he drew up rules for the direction of studies, and for determining the system of graduation, in the Order. In the year 1260 he was appointed Bishop of Ratisbon. Humbert de Romanis, Master General of the Dominicans, being loath to lose the services of the great Master, endeavoured to prevent the nomination, but was unsuccessful. Albert governed the diocese until 1262, when, upon the acceptance of his resignation, he voluntarily resumed the duties of a professor in the Studium at Cologne. In the year 1270 he sent a memoir to Paris to aid St. Thomas in combating Siger de Brabant and the Averroists. This was his second special treatise against the Arabian commentator, the first having been written in 1256, under the title "De Unitate Intellectus Contra Averroem". He was called by Pope Gregory X to attend the Council of Lyons (1274) in the deliberations of which he took an active part. The announcement of the death of St. Thomas at Fossa Nuova, as he was proceeding to the Council, was a heavy blow to Albert, and he declared that "The Light of the Church" had been extinguished. It was but natural that he should have grown to love his distinguished, saintly pupil, and it is said that ever afterwards he could not restrain his tears whenever the name of St. Thomas was mentioned. Something of his old vigour and spirit returned in 1277 when it was announced that Stephen Tempier and others wished to condemn the writings of St. Thomas, on the plea that they were too favourable to the unbelieving philosophers, and he journeyed to Paris to defend the memory of his disciple. Some time after 1278 (in which year he drew up his testament) he suffered a lapse of memory; his strong mind gradually became clouded; his body, weakened by vigils, austerities, and manifold labours, sank under the weight of years. He was beatified by Pope Gregory XV in 1622; his feast is celebrated on the 15th of November. The Bishops of Germany, assembled at Fulda in September, 1872, sent to the Holy See a petition for his canonization; he was finally canonized in 1931.

Two editions of Albert's complete works (Opera Omnia) have been published; one at Lyons in 1651, in twenty-one folio volumes, edited by Father Peter Jammy, O.P., the other at Paris (Louis Vivès), 1890-99, in thirty-eight quarto volumes, published under the direction of the Abbé Auguste Borgnet, of the diocese of Reims. Paul von Loë gives the chronology of Albert's writings the "Analecta Bollandiada" (De Vita et scriptis B. Alb. Mag., XIX, XX, and XXI). The logical order is given by P. Mandonnet, O.P., in Vacant's "Dictionnaire de théologie catholique". The following list indicates the subjects of the various treatises, the numbers referring to the volumes of Borgnet's edition. Logic: seven treatises (I. 2). Physical Sciences: "Physicorum" (3); "De Coelo et Mundo", "De Generatione et Corruptione". "Meteororum" (4); "Mineralium" (5); "De Natura locorum", " De passionibus aeris" (9). Biological: "De vegetabilibus et plantis" (10) " De animalibus" (11-12); "De motibus animalium", "De nutrimento et nutribili", "De aetate", "De morte et vita", "De spiritu et respiratione" (9). Psychological: "De Anima" (5); "De sensu et sensato", "De Memoria, et reminiscentia", "De somno et vigilia", "De natura et origine animae", "De intellectu et intelligibili", "De unitate intellectus" (9). The foregoing subjects, with the exception of Logic, are treated compendiously in the "Philosophia pauperum" (5). Moral and Political: "Ethicorum" (7); "Politocorum (8). Metaphysical: "Metaphysicorum" (6); "De causis et processu universitatis" (10). Theological: "Commentary on the works of Denis the Aereopagite" (14); "Commentary on the Sentences of the Lombard" (25-30); "Summa Theologiae" (31-33); "Summa de creaturis" (34-35); "De sacramento Eucharistiae" (38); "Super evangelium missus est" (37). Exegetical: "Commentaries on the Psalms and Prophets" (15-19); "Commentaries on the Gospels" (20-24); "On the Apocalypse" (38). Sermons (13). The "Quindecim problemata contra Averroistas" was edited by Mandonnet in his "Siger de Brabant" (Freiburg, 1899). The authenticity of the following works is not established: "De apprehensione" (5); "Speculum astronomicum" (5); "De alchimia" (38); Scriptum super arborem Aristotelis" (38); "Paradisus animae" (37); "Liber de Adhaerendo Deo" (37); "De Laudibus B. Virginis" (36); "Biblia Mariana" (37).

The influence exerted by Albert on the scholars of his own day and on those of subsequent ages was naturally great. His fame is due in part to the fact that he was the forerunner, the guide and master of St. Thomas Aquinas, but he was great in his own name, his claim to distinction being recognized by his contemporaries and by posterity. It is remarkable that this friar of the Middle Ages, in the midst of his many duties as a religious, as provincial of his order, as bishop and papal legate, as preacher of a crusade, and while making many laborious journeys from Cologne to Paris and Rome, and frequent excursions into different parts of Germany, should have been able to compose a veritable encyclopedia, containing scientific treatises on almost every subject, and displaying an insight into nature and a knowledge of theology which surprised his contemporaries and still excites the admiration of learned men in our own times. He was, in truth, a Doctor Universalis. Of him it in justly be said: Nil tetigit quod non ornavit; and there is no exaggeration in the praises of the modern critic who wrote: "Whether we consider him as a theologian or as a philosopher, Albert was undoubtedly one of the most extraordinary men of his age; I might say, one of the most wonderful men of genius who appeared in past times" (Jourdain, Recherches Critiques). Philosophy, in the days of Albert, was a general science embracing everything that could be known by the natural powers of the mind; physics, mathematics, and metaphysics. In his writings we do not, it is true, find the distinction between the sciences and philosophy which recent usage makes. It will, however, be convenient to consider his skill in the experimental sciences, his influence on scholastic philosophy, his theology.

It is not surprising that Albert should have drawn upon the sources of information which his time afforded, and especially upon the scientific writings of Aristotle. Yet he says: "The aim of natural science is not simply to accept the statements [narrata] of others, but to investigate the causes that are at work in nature" (De Miner., lib. II, tr. ii, i). In his treatise on plants he lays down the principle: Experimentum solum certificat in talibus (Experiment is the only safe guide in such investigations). (De Veg., VI, tr. ii, i). Deeply versed as he was in theology, he declares: "In studying nature we have not to inquire how God the Creator may, as He freely wills, use His creatures to work miracles and thereby show forth His power: we have rather to inquire what Nature with its immanent causes can naturally bring to pass" (De Coelo et Mundo, I, tr. iv, x). And though, in questions of natural science, he would prefer Aristotle to St. Augustine (In 2, Sent. dist. 13, C art. 2), he does not hesitate to criticize the Greek philosopher. "Whoever believes that Aristotle was a god, must also believe that he never erred. But if one believe that Aristotle was a man, then doubtless he was liable to error just as we are." (Physic. lib. VIII, tr. 1, xiv). In fact Albert devotes a lengthy chapter to what he calls "the errors of Aristotle" (Sum. Theol. P. II, tr. i, quaest. iv). In a word, his appreciation of Aristotle is critical. He deserves credit not only for bringing the scientific teaching of the Stagirite to the attention of medieval scholars, but also for indicating the method and the spirit in which that teaching was to be received. Like his contemporary, Roger Bacon (1214-94), Albert was an indefatigable student of nature, and applied himself energetically to the experimental sciences with such remarkable success that he has been accused of neglecting the sacred sciences (Henry of Ghent, De scriptoribus ecclesiasticis, II, x). Indeed, many legends have been circulated which attribute to him the power of a magician or sorcerer. Dr. Sighart (Albertus Magnus) examined these legends, and endeavoured to sift the truth from false or exaggerated stories. Other biographers content themselves with noting the fact that Albert's proficiency in the physical sciences was the foundation on which the fables were constructed. The truth lies between the two extremes. Albert was assiduous in cultivating the natural sciences; he was an authority on physics, geography, astronomy, mineralogy, chemistry (alchimia), zoölogy, physiology, and even phrenology. On all these subjects his erudition was vast, and many of his observations are of permanent value. Humboldt pays a high tribute to his knowledge of physical geography (Cosmos, II, vi). Meyer writes (Gesch. der Botanik): "No botanist who lived before Albert can be compared with him, unless it be Theophrastus, with whom he was not acquainted; and after him none has painted nature in such living colours, or studied it so profoundly, until the time of Conrad, Gesner, and Cesalpini. All honour, then, to the man who made such astonishing progress in the science of nature as to find no one, I will not say to surpass, but even to equal him for the space of three centuries." The list of his published works is sufficient vindication from the charge of neglecting theology and the Sacred Scriptures. On the other hand, he expressed contempt for everything that savoured of enchantment or the art of magic: "Non approbo dictum Avicennae et Algazel de fascinatione, quia credo quod non nocet fascinatio, nec nocere potest ars magica, nec facit aliquid ex his quae timentur de talibus" (See Quétif, I, 167). That he did not admit the possibility of making gold by alchemy or the use of the philosopher's stone, is evident from his own words: "Art alone cannot produce a substantial form". (Non est probatum hoc quod educitur de plumbo esse aurum, eo quod sola ars non potest dare formam substantialem — De Mineral., lib. II, dist. 3).

Roger Bacon and Albert proved to the world that the Church is not opposed to the study of nature, that faith and science may go hand in hand; their lives and their writings emphasize the importance of experiment and investigation. Bacon was indefatigable and bold in investigating; at times, too, his criticism was sharp. But of Albert he said: "Studiosissimus erat, et vidit infinita, et habuit expensum, et ideo multa potuit colligere in pelago auctorum infinito" (Opera, ed. Brewer, 327). Albert respected authority and traditions, was prudent in proposing the results of his investigations, and hence "contributed far more than Bacon did to the advancement of science in the thirteenth century" (Turner, Hist. of Phil.). His method of treating the sciences was historical and critical. He gathered into one vast encyclopedia all that was known in his day, and then expressed his own opinions, principally in the form of commentaries on the works of Aristotle. Sometimes, however, he hesitates, and does not express his own opinion, probably because he feared that his theories, which were "advanced" for those times, would excite surprise and occasion unfavourable comment. "Dicta peripateticorum, prout melius potui exposui: nec aliquis in eo potest deprehendere quid ego ipse sentiam in philosophia naturali" (De Animalibus, circa finem). In Augusta Theodosia Drane's excellent work on "Christian Schools and Scholars" (419 sqq.) there are some interesting remarks on "a few scientific views of Albert, which show how much he owed to his own sagacious observation of natural phenomena, and how far he was in advance of his age. . . ." In speaking of the British Isles, he alluded to the commonly received idea that another Island — Tile, or Thule — existed in the Western Ocean, uninhabitable by reason of its frightful clime, "but which", he says, has perhaps not yet been visited by man". Albert gives an elaborate demonstration of the sphericity of the earth; and it has been pointed out that his views on this subject led eventually to the discovery of America (cf. Mandonnet, in "Revue Thomiste", I, 1893; 46-64, 200-221).

More important than Albert's development of the physical sciences was his influence on the study of philosophy and theology. He, more than any one of the great scholastics preceding St. Thomas, gave to Christian philosophy and theology the form and method which, substantially, they retain to this day. In this respect he was the forerunner and master of St. Thomas, who excelled him, however, in many qualities required in a perfect Christian Doctor. In marking out the course which other followed, Albert shared the glory of being a pioneer with Alexander of Hales (d. 1245), whose "Summa Theologiae" was the first written after all the works of Aristotle had become generally known at Paris. Their application of Aristotelean methods and principles to the study of revealed doctrine gave to the world the scholastic system which embodies the reconciliation of reason and Orthodox faith. After the unorthodox Averroes, Albert was the chief commentator on the works of, Aristotle, whose writings he studied most assiduously, and whose principles he adopted, in order to systematize theology, by which was meant a scientific exposition and defence of Christian doctrine. The choice of Aristotle as a master excited strong opposition. Jewish and Arabic commentaries on the works of the Stagirite had given rise to so many errors in the eleventh, twelfth and thirteenth centuries that for several years (1210-25) the study of Aristotle's Physics and Metaphysics was forbidden at Paris. Albert, however, knew that Averroes, Abelard, Amalric, and others had drawn false doctrines from the writings of the Philosopher; he knew, moreover, that it would have been impossible to stem the tide of enthusiasm in favour of philosophical studies; and so he resolved to purify the works of Aristotle from Rationalism, Averroism, Pantheism, and other errors, and thus compel pagan philosophy to do service in the cause of revealed truth. In this he followed the canon laid down by St. Augustine (II De Doct. Christ., xl), who declared that truths found in the writings of pagan philosophers were to be adopted by the defenders of the true faith, while their erroneous opinions were to be abandoned, or explained in a Christian sense. (See St. Thomas, Summa Theol., I, Q. lxxxiv, a. 5.) All inferior (natural) sciences should be the servants (ancillae) of Theology, which is the superior and the mistress (ibid., 1 P., tr. 1, quaest. 6). Against the rationalism of Abelard and his followers Albert pointed out the distinction between truths naturally knowable and mysteries (e.g. the Trinity and the Incarnation) which cannot known without revelation (ibid., 1 P., tr. III, quaest. 13). We have seen that he wrote two treatises against Averroism, which destroyed individual immortality and individual responsibility, by teaching that there is but one rational soul for all men. Pantheism was refuted along with Averroism when the true doctrine on Universals, the system known as moderate Realism, was accepted by the scholastic philosophers. This doctrine Albert based upon the Distinction of the universal ante rem (an idea or archetype in the mind of God), in re (existing or capable of existing in many individuals), and post rem (as a concept abstracted by the mind, and compared with the individuals of which it can be predicated). "Universale duobus constituitur, natura, scilicet cui accidit universalitas, et respectu ad multa. qui complet illam in natura universalis" (Met., lib. V, tr. vi, cc. v, vi). A.T. Drane (Mother Raphael, O.S.D.) gives a remarkable explanation of these doctrines (op. cit. 344-429). Though follower of Aristotle, Albert did not neglect Plato. "Scias quod non perficitur homo in philosophia, nisi scientia duarum philosophiarum, Aristotelis et Platonis (Met., lib. I, tr. v, c. xv). It is erroneous to say that he was merely the "Ape" (simius) of Aristotle. In the knowledge of Divine things faith precedes the understanding of Divine truth, authority precedes reason (I Sent., dist. II, a. 10); but in matters that can be naturally known a philosopher should not hold an opinion which he is not prepared to defend by reason ibid., XII; Periherm., 1, I, tr. l, c. i). Logic, according to Albert, was a preparation for philosophy teaching how we should use reason in order to pass from the known to the unknown: "Docens qualiter et per quae devenitur per notum ad ignoti notitiam" (De praedicabilibus, tr. I, c. iv). Philosophy is either contemplative or practical. Contemplative philosophy embraces physics, mathematics, and metaphysics; practical (moral) plilosophy is monastic (for the individual), domestic (for the family), or political (for the state, or society). Excluding physics, now a special study, authors in our times still retain the old scholastic division of philosophy into logic, metaphysics (general and special), and ethics.

In theology Albert occupies a place between Peter Lombard, the Master of the Sentences, and St. Thomas Aquinas. In systematic order, in accuracy and clearness he surpasses the former, but is inferior to his own illustrious disciple. His "Summa Theologiae" marks an advance beyond the custom of his time in the scientific order observed, in the elimination of useless questions, in the limitation of arguments and objections; there still remain, however, many of the impedimenta, hindrances, or stumbling blocks, which St. Thomas considered serious enough to call for a new manual of theology for the use of beginners — ad eruditionem incipientium, as the Angelic Doctor modestly remarks in the prologue of his immortal "Summa". The mind of the Doctor Universalis was so filled with the knowledge of many things that he could not always adapt his expositions of the truth to the capacity of novices in the science of theology. He trained and directed a pupil who gave the world a concise, clear, and perfect scientific exposition and defence of Christian Doctrine; under God, therefore, we owe to Albertus Magnus the "Summa Theologica" of St. Thomas.

D.J. KENNEDY