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A
Aachen
Aarhus, Ancient See of -- Located in Denmark
Aaron
Abachum, Audifax, Martha, and Maris, Saints
Abaddon
Abandonment
Abarca, Pedro
Abarim
Abba
Abbadie, Antoine d'
Abban of Magheranoidhe, Saint
Abban of New Ross, Saint
Abban the Hermit, Saint
Abbé
Abbeloos, Jean Baptiste -- Orientalist (1836-1906)
Abbess
Abbey
Abbo Cernuus
Abbon, Saint
Abbot
Abbot, Commendatory
Abbot, Henry
Abbot, Lay
Abbreviation, Methods of
Abbreviations, Ecclesiastical
Abbreviators
Abdera
Abdias
Abdias of Babylon -- Apocryphal writer
Abdication
Abdon and Sennen, Saints -- Persian martyrs under Decius (c. A.D. 250)
Abduction
Abecedaria
Abecedarians
Abel -- Second son of Adam
Abel -- Biblical place-name
Abel, Blessed Thomas -- Priest and martyr (1497-1540)
Abelard, Peter -- Dialectician, philosopher, and theologian (1079-1142)
Abelly, Louis -- Associate of St. Vincent de Paul (1603-1691)
Abenakis
Aben-Ezra, Abraham-ben-Méir -- Spanish rabbi (1092-1167)
Abercius, Inscription of
Abercromby, John
Abercromby, Robert -- Jesuit missionary in Scotland (1532-1613)
Aberdeen, The Diocese of
Aberdeen, The University of
Aberle, Moritz von
Abgar, The Legend of
Abhan, Saint
Abiathar
Abila
Abingdon, The Abbey of
Abington, Thomas -- English antiquarian (1560-1647)
Abiogenesis and Biogenesis
Abipones
Abisai -- Nephew of King David
Abjuration
Abner
Abomination of Desolation, The
Abortion
Abortion, Physical Effects of
Abra de Raconis, Charles François d'
Abrabanel, Don Isaac
Abraham
Abraham (in Liturgy)
Abraham, The Bosom of
Abraham a Sancta Clara
Abraham Ecchelensis
Abrahamites
Abram, Nicholas
Abrasax
Absalom
Absalon of Lund
Absinthe
Absolute, The -- Philosophical term referring to God
Absolution
Abstemii
Abstinence
Abstinence, Physical Effects of
Abstraction
Abthain
Abucara, Theodore
Abundius
Abydus
Abyss
Abyssinia
Acacia
Acacians, The -- Fourth-century Arian sect
Acacius -- Bishop of Beroea (322-432)
Acacius -- Fourth-century Bishop of Caesarea in Palestine
Acacius -- Patriarch of Constantinople (d. 489)
Acacius, Saint -- Third-century bishop
Academies, Roman
Academy, The French
Acadia
Acanthus -- Titular see in Macedonia
Acanthus -- Ornamental plant
Acathistus
Acca, Saint -- English bishop (660-742)
Accaron
Accentus Ecclesiasticus
Acceptance
Acceptants
Accession
Accessus
Acciajuoli
Accident
Acclamation
Acclamation (in Papal Elections)
Accommodation, Biblical
Accomplice
Accursius, Francesco
Acephali -- Early schismatics
Acerenza -- Italian archdiocese
Achab -- King of Israel
Achaia
Achaicus -- A Christian mentioned in St. Paul's epistles
Achaz -- King of Judah
Achéry, Lucas d'
Achiacharus -- Nephew of Tobias
Achilleus and Nereus, Domitilla and Pancratius, Saints
Achimaas
Achimelech
Achitopel
Achonry -- Diocese in Ireland
Achor Valley
Achrida
Achterfeldt, Johann Heinrich
Achtermann, Theodore William
Acidalius, Valens
Aci-Reale, The Diocese of
Ackermann, Leopold -- Catholic exegist (1771-1831)
Acmonia -- Titular see
Acoemetae
Acolouthia
Acquapendente
Acquaviva -- Name of several Italian cardinals
Acquaviva, Claudius
Acolyte
Acosta, Joaquín
Acosta, José de
Acquapendente
Acquaviva
Acqui
Acre
Acre -- Titular see
Acrostic
Act of Settlement (Irish)
Acta Pilati
Acta Sanctæ Sedis
Acta Sanctorum Hiberniæ
Acta Triadis Thaumaturgæ
Acton, Charles Januarius
Acton, John
Acton, John Emerich Edward Dalberg, Baron Acton
Acton, John Francis Edward
Acts, Canonical
Acts, Human
Acts, Indifferent
Acts of the Apostles
Acts of the Martyrs
Acts of Roman Congregations
Actual Grace
Actus et Potentia
Actus primus -- Scholastic philosophical term
Actus Purus
Acuas
Ad Apostolicae Dignitatis Apicem
Ad Limina Apostolorum
Ad Sanctam Beati Petri Sedem
Ad Universalis Ecclesiae
Ad Limina Visit
Adalard, Saint -- Apostle of the Slavs (d. 981)
Adalbert
Adalbert I
Adalbert, Saint -- Apostle of Prussia (939-997)
Adalbert, Saint
Adam -- First man and father of the human race
Adam in Early Christian Liturgy and Literature
Adam, The Books of
Adam of Bremen
Adam of Fulda
Adam of Murimuth
Adam of Perseigne
Adam of St. Victor
Adam of Usk
Adam, John
Adam, Nicholas -- French linguist and writer (1716-1792)
Adam Scotus -- Twelfth-century Premonstratensian theologian
Adami da Bolsena, Andrea
Adamites
Adamnan, Saint -- Abbot of Iona (624-704)
Adams, James -- Jesuit professor of humanities (1737-1802)
Adams, Ven. John -- Martyred English priest (d. 1586)
Adana
Adar
Adauctus and Felix, Saints -- Roman martyrs (d. 303)
Adda, Ferdinando d'
Addai, Doctrine of -- Syriac document which relates the conversion of Edessa
Addas
Addeus and Maris, Liturgy of
Addresses, Ecclesiastical
Adelaide, Archdiocese of
Adelaide, Saint -- Abbess (d. 1015)
Adelaide, Saint -- Daughter of the King of Burgundy (931-999)
Adelard of Bath -- Twelfth-century Scholastic philosopher
Adelham, John Placid -- Convert from Protestantism (d. 1681)
Adelmann -- Eleventh-century Bishop of Brescia
Adelophagi -- Fourth-century sect
Aden
Adeodatus I, Pope Saint -- Reigned 615-618
Adeodatus -- Son of St. Augustine (372-388)
Adeodatus (II), Pope Saint -- Reigned 672-676
Adeste Fidelis
Adjuration
Administrator
Administrator (of Ecclesiastical Property)
Admonitions, Canonical
Admont
Ado of Vienne, Saint
Adonai
Adonias
Adoption
Adoption, Canonical
Adoption, Supernatural
Adoptionism
Adoration
Adoration, Perpetual
Adorno, Francis -- Italian preacher (1531-1586)
Adoro Te Devote
Adria
Adrian I, Pope -- Reigned 772-95
Adrian II, Pope -- Reigned 867-872
Adrian III, Pope Saint -- Reigned 884-885
Adrian IV, Pope -- Reigned 1154-1159
Adrian V, Pope -- Reigned 1276
Adrian VI, Pope -- Reigned 1522-1523
Adrian of Canterbury, Saint -- Archbishop of Canterbury (d. 710)
Adrian of Castello
Adrianople
Adrichem, Christian Kruik van
Adso
Aduarte, Diego Francisco
Adullam
Adulteration of Food
Adultery
Advent
Adventists
Advertisements, Book of
Advocates of Roman Congregations
Advocates of St. Peter
Advocatus Diaboli -- "Devil's Advocate"
Advocatus Ecclesiæ
Advowson
Adytum
Aedan of Ferns, Saint -- Bishop and patron of Ferns, Ireland (550-632)
Aedh of Kildare -- Sixth-century King of Leinster, Ireland
Aegidius of Assisi, Blessed -- One of the original companions of St. Francis (d. 1262)
Aegidius of Viterbo
Aelfred the Great -- King of the West Saxons (849-899)
Aelfric, Abbot of Eynsham
Aelnoth
Aelred, Saint
Æneas of Gaza
Aengus, Saint (the Culdee) -- Eighth-century Irish saint
Aenon
Aeons
Aër
Aërius of Pontus -- Early heretic
Æsthetics
Æterni Patris -- Apostolic Letter of Pius IX
Æterni Patris -- Encyclical of Leo XIII
Aëtius
Affinity (in the Bible)
Affinity (in Canon Law)
Affirmation
Afflighem -- Benedictine abbey in Belgium
Affre, Denis Auguste -- Archbishop of Paris (1793-1848)
Afonzo de Albuquerque
Afra, Saint -- Roman martyr
Africa
African Church, Early
African Liturgy
African Synods
Agabus
Agape
Agapetæ
Agapetus Fifth-century deacon
Agapetus I, Pope Saint -- Reigned 535-536
Agapetus II, Pope -- Reigned 946-955
Agar, William Seth -- English Canon (1815-1872)
Agatha, Saint
Agathangelus
Agathias
Agatho, Pope Saint -- Reigned 678-81
Agaunum
Agazzari, Agostini
Agde, Council of
Age, Canonical
Age of Reason
Agen, Diocese of
Agents of Roman Congregations
Aggeus
Aggressor, Unjust
Agiles, Raymond d' -- French chronicler
Agilulfus, Saint -- Bishop and martyr (d. 750)
Agios O Theos
Agnelli, Giuseppe
Agnelli, Fra. Guglielmo
Agnellus of Pisa, Blessed -- Founder of the English Franciscan Province (1195-1236)
Agnellus, Andreas, of Ravenna
Agnes of Assisi, Saint
Agnes of Bohemia, Blessed
Agnes of Montepulciano, Saint
Agnes of Prague, Blessed
Agnes of Rome, Saint and Martyr
Agnesi, Maria Gaetana
Agnetz
Agnoetae
Agnosticism
Agnus Dei
Agnus Dei (in Liturgy)
Agony, Archconfraternity of Holy
Agonistici
Agony of Christ
Agostini, Paolo -- Italian composer (1593-1629)
Agostino Novello, Blessed
Agoult, Charles Consstance César Joseph Matthieu d'
Agra
Agram
Agrapha
Agrarianism
Agreda, Maria de -- Franciscan mystic (1602-1665)
Agria
Agricius, Saint -- Fourth-century bishop of Trier
Agricola, Alexander
Agricola, George
Agricola, Rudolph
Agrippa of Nettesheim, Heinrich Cornelius
Agrippinus
Aguas Calientes
Aguirre, Joseph Saenz de
Ahicam
Ahriman and Ormuzd
Aiblinger, Johann Caspar
Aichinger, Gregor
Aidan of Lindisfarne, Saint
Aiguillon, Duchess of
Aikenhead, Mary
Ailbe, Saint -- Irish bishop (d. 527)
Ailleboust, Family of d'
Ailly, Pierre d'
Aileran, Saint -- Irish professor (d. 664)
Aimerich, Mateo -- Spanish Jesuit philologist (1715-1799)
Aire -- Diocese in France
Airoli, Giacomo Maria -- Jesuit Orientalist and Scriptural commentator (1660-1721)
Aisle -- Architectural term
Aistulph -- King of the Lombards (d. 756)
Aix, Archdiocese of
Aix-en-Provence, Councils of
Ajaccio, Diocese of
Akathistos
Akhmin
Akominatos, Michael & Nicetas
Alabama
Alabanda -- Titular see
Alabaster
Alagoas -- South American diocese
Alagona, Pietro -- Theologian (1549-1624)
Alain de l'Isle -- Monk and philosopher (1128-1203)
Alalis -- Titular see of Phoenicia
Alaman, Lucas -- Mexican statesman and historian (1792-1853)
Alamanni, Niccolò -- Roman antiquary (1583-1626)
Alan of Tewkesbury -- Benedictine abbot and writer (1202)
Alan of Walsingham -- Architect (d. 1364)
Alanus de Rupe -- Dominican promoter of the Rosary (1428-1475)
Alarcón, Pedro Antonio de -- Spanish novelist and poet (1833-1891)
Alaska
Alatri
Alb
Alba Pompeia, Diocese of
Alban, Saint
Albanenses
Albani
Albania
Albano
Albany
Albenga
Albergati, Niccolo
Alberic of Monte Cassino
Alberic of Ostia -- Benedictine monk and cardinal (1080-1147)
Albero de Montreuil
Alberoni, Giulio
Albert, Bishop of Riga
Albert II, Archbishop of Magdeburg in Saxony
Albert, Blessed (Patriarch of Jerusalem)
Albert, Saint -- Cardinal, Bishop of Liège (d. 1192)
Albert Berdini of Sarteano, Blessed
Albert of Aachen
Albert of Brandenburg
Albert of Castile
Albert of Saxony
Albert of Stade -- Thirteenth-century chronicler
Alberta and Saskatchewan
Alberti, Leandro
Alberti, Leone Battista
Albertini, Nicolò
Albertrandi, John Baptist
Albertus Magnus, Saint
Albi (Albia), Archdiocese of
Albi, Council of
Albi, Juan de
Albicus, Sigismund
Albigenses
Albinus
Albrechtsberger, Johann G.
Albright Brethren, The
Alcalá, University of
Alcántara, Military Order of
Alcedo, Antonio de
Alchemy
Alcmund, Saint
Alciati, Andrea
Alcimus
Alcock, John
Alcoholism
Alcuin
Aldegundis, Saint
Aldersbach
Aldfrith
Aldhelm, Saint -- Abbot and bishop (639-709)
Aldric, Saint -- Bishop of Le Mans (800-856)
Aldrovandi, Ulissi
Alea, Leonard
Alegambe, Philippe
Alegre, Francisco Xavier
Alemany, Joseph Sadoc -- First Archbishop of San Francisco (1814-1888)
Alenio, Guilio
Aleppo
Ales and Terralba
Alessandria della Paglia
Alessi, Galeazzo
Alessio
Alexander (Name of Seven Men)
Alexander (Name of Several Early Bishops)
Alexander I, Pope Saint
Alexander II, Pope
Alexander III, Pope
Alexander IV, Pope
Alexander V
Alexander VI, Pope
Alexander VII, Pope
Alexander VIII, Pope
Alexander, Saint (Of Cappadocia and Jerusalem)
Alexander, Saint (Bishop of Comana)
Alexander, Saint (Patriarch of Alexandria)
Alexander Briant, Blessed
Alexander Natalis
Alexander of Abonoteichos
Alexander of Hales
Alexander of Lycopolis -- Fourth-century writer
Alexander Sauli, Blessed -- Apostle of Corsica (1533-1592)
Alexandre, Dom Jacques -- Benedictine monk (1653-1734)
Alexandria -- Egyptian city
Alexandria, Councils of
Alexandria, The Church of
Alexandria, The Diocese of
Alexandrian Library, The
Alexandrine Liturgy, The
Alexandrinus, Codex
Alexian Nuns
Alexians
Alexis Falconieri, Saint
Alexius, Saint
Alfield, Venerable Thomas
Alfieri, Count Vittorio
Alfieri, Pietro
Alfonso de Zamora -- Converted Spanish Rabbi (d. 1531)
Alfonso of Burgos
Alford, Michael
Alfred the Great -- King of the West Saxons (849-899)
Alfrida, Saint -- Eighth-century virgin and recluse
Alfwold, Saint -- English bishop (d. 1058)
Alger of Liége -- French priest (1055-1132)
Alghero
Algiers
Algonquins
Alife
Alighieri, Dante
Alimentation
Alimony
Aliturgical Days
All Hallows College
All Saints' Day
All Souls' Day
Allah
Allahabad
Allard, Paul -- Archaeologist and historian (b. 1841)
Allatius, Leo
Allegranza, Joseph
Allegri, Antonio
Allegri, Gregorio
Alleluia
Allemand, Jean
Allen, Edward Patrick
Allen, Frances
Allen, George
Allen, John -- Archbishop of Dublin
Allen, John -- English martyr
Allen, William
Allerstein, August
Alliance, Holy
Allies, Thomas William
Allioli, Joseph Franz
Allison, William
Allocution
Allori
Allot, William -- English priest
Allouez, Claude -- Jesuit missionary and explorer (1620-1689)
Alma
Alma Redemptoris Mater
Almagro, Diego de
Almedha, Saint
Almeida, John -- Jesuit missionary (1571-1653)
Almeria
Almici, Camillo -- Italian Oratorian priest (1714-1779)
Almond, John -- English Cistercian and Confessor the Faith (d. 1585)
Almond, John, Venerable -- English priest and martyr (1577-1612)
Almond, Oliver -- Sixteenth-century English priest and writer
Alms and Almsgiving
Alnoth, Saint -- Hermit and martyr (d. 700)
Alogi
Aloysius Gonzaga, Saint
Alpha and Omega (in Scripture)
Alpha and Omega
Alphabet, Christian Use of the
Alphege, Saint
Alphonsus Liguori, Saint
Alphonsus Rodriguez, Saint
Alpini, Prospero -- Physician and botanist (1553-1617)
Alsace-Lorraine
Altamirano, Diego Francisco
Altamura and Acquaviva
Altar Bell
Altar Breadboxes
Altar Breads
Altar Candles
Altar Candlesticks
Altar Canopy
Altar Cards
Altar Carpets
Altar Cavity
Altar Cloths
Altar Crucifix
Altar Curtain
Altar, Double
Altar Frontal
Altar, High
Altar Horns
Altar Lamp
Altar Lanterns
Altar Ledge
Altar Linens
Altar (in Liturgy)
Altar of Our Lady
Altar of Repose
Altarpiece
Altar, Portable
Altar, Privileged
Altar Protector
Altar Rail
Altar Screen
Altar Side
Altar Steps
Altar Stole
Altar Stone
Altar, Stripping of an
Altar Tomb
Altar Vase
Altar Vessels
Altar Wine
Altarage
Altars (in the Greek Churches)
Altars (in Scripture)
Altar, History of the Christian
Altmann, Blessed
Alto, Saint -- Eighth-century missionary in Bavaria
Alton
Altoona
Altruism
Alumbrados
Alumnus
Alunno, Niccolò
Alva, The Duke of
Alva y Astorga, Pedro d'
Alvarado, Alonzo de
Alvarado, Fray Francisco de
Alvarado, Pedro de
Alvarez, Balthazar
Alvarez, Diego
Alvarez, Manoel
Alvarez de Paz
Alvarus Pelagius -- Spanish writer (1280-1352)
Alypius, Saint
Alzate, José Antonio
Alzog, Johann Baptist
Ama
Amadeo, Giovanni Antonio
Amadia and Akra
Amalarius of Metz
Amalberga, Saint -- Relative of Pepin of Landen
Amalberga, Saint -- Virgin who rejected Charlemagne's advances
Amalec
Amalfi
Amalricians
Amalricus Augerii
Amandus, Saint
Amasia -- Titular see in Cilicia
Amastris -- Titular see in Asia Minor
Amat, Thaddeus -- California bishop (1810-1878)
Amathus -- Name of two titular sees
Amazones, Diocese of -- South American diocese
Ambarach, Peter -- Maronite Orientalist (1663-1742)
Ambition -- The undue craving for honor
Ambo
Ambo (in the Russian and Greek Church)
Amboise, George d'
Ambronay, Our Lady of
Ambros, August Wilhelm
Ambrosian Basilica
Ambrosian Hymnography
Ambrosian Library
Ambrose, Saint
Ambrose of Camaldoli, Saint -- Italian theologian (1386-1439)
Ambrose of Sienna, Blessed -- Dominican (1220-1286)
Ambrosian Chant
Ambrosian Liturgy and Rite
Ambrosians
Ambrosiaster
Ambulatory
Amelia
Amelote, Denis
Amen
Amende Honorable
Amerbach, Veit
America
America, Pre-Columbian Discovery of
American College at Louvain, The
American College in Rome, The
American College in Rome, The South
American Protective Association, The
Amerigo Vespucci
Amherst, Francis Kerril, D.D. -- English bishop (1819-1883)
Amias, Ven. John -- English martyr (d. 1589)
Amiatinus, Codex
Amice
Amico, Antonio
Amico, Francesco
Amida -- Armenian diocese
Amiens, Diocese of
Amiot, Joseph Maria
Amisus
Ammen, Daniel
Ammon
Ammon, Saint
Ammonian Sections
Ammonites
Amorbach
Amorios
Amorrhites
Amort, Eusebius
Amos -- Old Testament prophet
Amovibility
Amoy -- Chinese Vicariate Apostolic
Ampè, André-Marie -- Physicist and mathematician (1775-1836)
Amphilochius of Iconium -- Fourth-century Cappadocian bishop
Amphilochius of Sida -- Fifth-century bishop
Amphoræ
Ampleforth, The Abbey of -- Benedictine abbey in England
Ampullæ
Ampurias
Amra
Amrah
Amraphel
Amsterdam
Amulet
Amulets, Use and Abuse of
Amyclae
Amyot, Jacques
Anabaptists
Anacletus, Pope Saint
Anacletus II
Anæsthesia
Anagni
Analogy
Analysis
Anaphora
Anarchy
Anastasia, Saint
Anastasiopolis -- Name of four ancient sees
Anastasius, Saint -- Sixth-century Bishop of Antioch
Anastasius I, Pope Saint -- Reigned 399-403
Anastasius II, Pope -- Reigned 496-498
Anastasius III, Pope -- Reigned 911-913
Anastasius IV, Pope -- Reigned 1153-1154
Anastasius, Saint -- Martyred in A.D. 628
Anastasius Bibliothecarius -- Librarian of the Roman Church (810-879)
Anastasius Sinaita, Saint -- Seventh-century Greek writer
Anathema
Anathoth
Anatolia, Saint -- Roman virgin and martyr
Anatolius, Saint -- Bishop of Laodicea in Syria (d. 283)
Anatolius, Saint -- Fifth-century Patriarch of Constantinople
Anatolia, Saint
Anatomy
Anazarbus
Añazco, Pedro de
Anchieta, Joseph
Anchor (as Symbol), The
Anchorites
Ancient of Days
Ancilla Dei
Ancona, Ciriaco d'
Ancona and Umana
Ancren Riwle
Ancyra
Ancyra, Councils of
Andalusia
Andechs -- Benedictine monastery in Bavaria
Anderdon, William Henry
Anderledy, Anthony Maria
Anderson, Henry James
Anderson, Lionel Albert
Anderson, Patrick
Anderton, James
Anderton, Venerable Robert -- English priest and martyr (1560-1586)
Anderton, Roger -- English Catholic layman (d. 1640)
Anderton, Thomas -- English Benedictine (1611-1671)
Andlaw, Heinrich Bernhard, Freiherr von -- Catholic statesman (1802-1871)
Andlaw, Venerable William -- Martyred atYork in 1597
Andrada, Alonso
Andrada, Antonio de
Andrada de Payva, Diego -- Portuguese theologian (1528-1575)
André, Bernard -- Fifteenth-century friar, poet, chronographer
André, Yves Marie -- Mathematician (1675-1764)
Andrea, Giovanni d' -- Canonist (1275-1348)
Andrea Dotti, Blessed
Andrea Pisano
Andreas of Caesarea -- Cappadocian bishop
Andreas, Saint -- Theologian, homilist, hymnographer (d. 740)
Andreas of Ratisbon -- Fourteenth-century historian
Andreis, Felix de -- Lazarist superior (1778-1820)
Andres, Juan -- Sixteenth-century Spanish canonist
Andrés, Juan -- Littérateur and historian (1740-1817)
Andrew, Saint (Apostle and Martyr)
Andrew, Saint (Martyr of Lampsacus)
Andrew Avellino, Saint
Andrew Bobola, Saint
Andrew Corsini, Saint
Andrew of Crete, Saint -- Theologian, homilist, hymnographer (d. 740)
Andrew of Lonjumeau -- Dominican missionary and papal ambassador (d. 1253)
Andrew of Rhodes
Andrew the Scot, Saint
Andrews, William Eusebius -- Editor and author (1773-1837)
Andronicus, Probus, and Tarachus, Saints -- Martyrs of the Diocletian persecution (c. 304)
Andria, Diocese
Anemurium -- Titular see of Cilicia
Anerio, Felice
Anerio, Giovanni Francesco
Anfossi, Filippo
Ange de Saint Joseph
Ange de Sainte Rosalie
Angel
Angel, Guardian
Angela Merici, Saint -- Foundress of the Ursulines (1474-1540)
Angela of Foligno, Blessed -- Umbrian penitent and mystical writer (1248-1309)
Angeli, Francesco degli -- Missionary to Ethiopia (1567-1628)
Angeli, Girolamo degli -- Missionary to Japan (1567-1623)
Angelicals, The
Angelico, Fra -- Florentine painter (1387-1455)
Angelo Carletti di Chivasso, Blessed
Angelo Clareno da Cingoli
Angels, Early Christian Representations of
Angels of the Churches
Angelus
Angelus Bell
Angelus, Silesius
Anger
Angers
Angers, University of
Anges, Notre Dame de
Angilbert, Saint
Angiolini, Francesco
Anglesea, The Priory of
Anglican Orders
Anglicanism
Anglin, Timothy Warren
Anglo-Saxon Church, The
Anglona-Tursi
Angola and Congo
Angora
Angoulême
Angra
Angulo, Pedro
Anhalt
Anicetus, Pope Saint -- Reigned 155-166
Anima, College and Church of the, in Rome
Anima Christi
Animals in Christian Art
Animals in the Bible
Animals, Cruelty to
Animism
Animuccia, Giovanni
Anise
Anna
Anna Comnena
Annals, Ecclesiastical
Annas
Annat, François
Annates
Anne, Saint
Anne d'Auray, Sainte
Anne de Beaupré, Sainte
Anne de Xainctonge, Venerable
Annecy
Annegarn, Joseph
Anne Line, Saint
Anne-Marie Javouhey, Venerable
Annibaldi, Annibale d'
Annibale, Giuseppe d'
Annius of Viterbo
Anno, Saint
Annunciation of the Blessed Virgin Mary, The Fact of the
Annunciation of the Blessed Virgin Mary, The Feast of the
Annunciation, The Orders of the
Anointing of the Sick
Anquetil, Louis-Pierre
Ansaldi, Casto Innocenzio
Ansaloni, Giordano -- Dominican missionary to Asia (d. 1634)
Anschar, Saint -- Called the Apostle of the North (801-865)
Anse, Councils of -- A series of medieval councils
Ansegisus
Ansegisus, Saint
Anselm, Saint -- Archbishop of Canterbury, Doctor of the Church (1033-1109)
Anselm, Saint -- Eighth-century Italian Abbot
Anselm of Laon -- Medieval theologian (d. 1117)
Anselm of Liège -- Belgian chronicler (1008-1056)
Anselm of Lucca (the Younger), Saint
Anselme, Antoine
Anslo, Reyer -- Dutch poet and convert (1622-1669)
Anstey, Thomas Chisholm -- Lawyer and politician (1816-1873)
Antediluvians
Anterus, Pope Saint -- Reigned 235-236
Anthelmi, Joseph -- French ecclesiastical historian (1648-1697)
Anthemius -- Fourth-century Byzantine official
Anthony of the Desert, Saint
Anthony, Orders of Saint
Anthony of Padua, Saint
Anthony of Sienna
Anthony of the Mother of God
Anthropomorphism, Anthropomorphites
Antichrist
Antidicomarianites
Antidoron
Antigonish
Antimensium
Antinoe
Antinomianism
Antioch
Antioch, The Church of
Antiochene Liturgy
Antiochus of Palestine -- Seventh-century monk
Antipater of Bostra -- Fifth-century Greek prelate
Antipatris -- Titular see of Palestine
Antiphellos -- Titular see of Lycia
Antiphon
Antiphon (in the Greek Church)
Antiphon (in Greek Liturgy)
Antiphon, Communion
Antiphonary
Antiphonary, Gregorian
Antipodes
Antipope
Antiquities, Biblical
Antivari
Antofogaste
Antoine, Paul Gabriel -- French theologian (1678-1743)
Anton Ulrich
Antonelli, Giacomo
Antonelli, Leonardo
Antonelli, Nicolò Maria
Antoniano, Giovanni
Antoniano, Silvio
Antoniewicz, Charles -- Polish Jesuit and missionary (1807-1852)
Antoninus, Saint
Antoninus Pius
Antonio Maria Zaccaria, Saint
Antonio of Vicenza, Maria
Antonius
Antony, Franz Joseph
Antwerp
Anunciación, Fray Domingo de la
Anunciación, Fray Juan de la
Aosta
Apaches
Apameia
Aparisi y Guijarro, Antonio
Apelles
Aphian, Saint
Aphraates
Apiarius of Sicca
Apocalypse, Book of
Apocatastasis
Apocrisiarius
Apocrypha
Apodosis
Apollinarianism
Apollinaris
Apollinaris, Saint
Apollinaris (the Elder)
Apollinaris Claudius, Saint
Apollonia, Saint
Apollonius of Ephesus
Apologetics
Apolysis
Apolytikion
Apophthegmata Patrum
Aporti, Ferrante
Apostasy
Apostle (in Liturgy)
Apostle Spoons
Apostles, The
Apostles, Acts of the
Apostles' Creed
Apostles, Portraits of the
Apostles of Erin, The Twelve
Apostleship of Prayer, The
Apostolic Blessing
Apostolic Camera
Apostolic Churches
Apostolic Church-Ordinance
Apostolic College
Apostolic Constitutions
Apostolic Executor
Apostolic Expeditors
Apostolic Fathers, The
Apostolic Letters
Apostolic Majesty
Apostolic See, The
Apostolic Succession
Apostolic Union of Secular Priests, The
Apostolicae Curae -- On Anglican Orders
Apostolicæ Sedis Moderationi
Apostolicæ Servitutis
Apostolici
Apostolici Ministerii
Apostolici Regiminis
Apostolicity
Apostolicum Pascendi Munus
Apotactics
Apotheosis
Apparitions
Apparitor
Appeal as from an abuse
Appeals
Appetite
Approbation
Appropriation
Apse
Apse Chapel
Apsidiole
Apt, Council of -- Held in 1365
Aquarians
Aquila -- Archdiocese in Italy
Aquila and Priscilla
Aquileia
Aquileia, Councils of
Aquileian Rite
Aquinas, St. Thomas
Aquino, Sora, and Pontecorvo
Arabia
Arabia, Vicariate Apostolic of
Arabia, Councils of
Arabian School of Philosophy
Arabici
Arabissus
Arad
Aragon and Castile
Aran, The Monastic School of
Aranda, Council of -- Spanish Council held in 1473
Aranda, Philip -- Jesuit theologian (1642-1695)
Arason Jón
Arator
Araucania -- Prefecture Apostolic in Chile
Araucanians -- Indian tribe in Chile
Araujo, Antonio de -- Brazilian missionary (d. 1632)
Araujo, Francisco de
Arawaks
Arbieto, Ignacio de -- Jesuit (1585-1676)
Arbitration
Arbogast, Saint
Arbroath, Abbey of
Arbuthnott, Missal of
Arca
Arcachon, Our Lady of
Arcadelt, Jacob
Arcadiopolis
Arcae
Arcanum
Arch
Archæology, Christian
Archæology, The Commission of Sacred
Archange de Lyon
Archbishop
Archconfraternity
Archdeacon
Archdeacon, Richard
Archdiocese
Archelais
Archeology, Christian
Archer, James
Arches, The Court of
Archiereus
Archimandrite
Archinto, Filipo
Architecture, Ecclesiastical
Architecture, Gothic
Archives, Ecclesiastical
Archontics
Archpriest
Archpriest Controversy
Arcosolium
Arculf
Ardagh
Ardbraccan
Ardchatten, The Priory of
Arden, Edward
Ardilliers, Notre Dame des
Aremberg, Prince Charles d' -- Definitor-general and Commissary of the Capuchins (d. 1669)
Areopolis -- Titular See of Palestine
Arequipa, Diocese of
Arethas of Caesarea
Arethusa
Arévalo, Faustino -- Jesuit hymnographer and patrologist (1747-1824)
Arévalo, Rodríguez Sanchez de
Arezzo
Argenson, Pierre de Voyer d'
Argentina
Argos
Argüello, Luis Antonio
Argyll and the Isles, Diocese of
Argyropulos, John
Arialdo, Saint
Arianism
Ariano
Arias, Francis
Arias de Avila, Pedro
Arias Montanus, Benedictus
Ariassus
Aribo
Arindela
Ariosto, Ludovico
Aristeas
Aristides
Aristotle
Arius -- Heresiarch (250-336)
Arizona
Ark, Noah's
Ark of the Covenant
Arkansas
Arlegui, Fray José
Arles, The Synods of
Armada, The Spanish
Armagh
Armagh, The Book of
Armagh, The School of
Armagnac, Georges d'
Armellino, Mariano -- Benedictine historian (1657-1737)
Armenia
Armenierstadt
Armentia, Fray Nicolás
Armidale
Arminianism
Arnauld -- Celebrated French family
Arne, Thomas Augustine
Arni Thorlaksson
Arnobius
Arnold -- Name of several medieval figures
Arnold of Brescia
Arnoldi, Alberto
Arnoldi, Bartholomaeus
Arnolfo di Cambio
Arnoudt, Peter Joseph -- Jesuit spiritual writer (1811-1865)
Arnpeck, Veit
Arnulf of Bavaria
Arnulf of Lisieux
Arnulf of Metz, Saint -- Merovingian bishop and statesman (580-640)
Arras
Arras, Councils of
Arriaga, Pablo José -- Jesuit missionary to Peru (1564-1621)
Arricivita, Juan
Arrighetti, Nicola
Arrighetti, Nicolò
Arrowsmith, Venerable Edmund
Arsacidæ
Arsenius Autorianos -- Patriarch of Constantinople (d. 1273)
Arsenius, Saint -- Anchorite (354-450)
Arsinoe
Art, Christian
Art, Ecclesiastical
Artemon
Arthur, King -- See Literary or Profane Legends
Arthur, James
Arthur, Thomas
Articles of Faith
Articles, The Organic
Artoklasia
Arts, Bachelor of
Arts, The Faculty of
Arts, Master of
Arts, The Seven Liberal
Artvin
Arundel, Thomas
Arundell
Asaph, Saint
Ascalon
Ascelin
Ascendente Domino
Ascension
Ascension, Feast of the
Ascetical Theology
Asceticism
Aschbach, Joseph, Ritter von
Ascoli-Piceno
Ascoli, Satriano, and Cirignola -- Diocese in Italy
Aseity
Aseneth
Aser
Asgaard
Ash Wednesday
Ashby, George -- Martyred English monk (d. 1537)
Ashby, Thomas
Ashes
Ashley, Venerable Ralph
Ashton, John
Ashton, Venerable Roger
Asia
Asia Minor
Asiongaber -- Idumean city
Aske, Robert -- English insurgent (d. 1537)
Asmodeus -- Demon mentioned in the Book of Tobias
Aspendus -- Titular see in Asia Minor
Asperges
Aspilcueta, Martin -- Spanish canonist and moral theologian (1491-1586)
Ass, The, in Caricature of Christians
Assam
Assemani
Assemblies of the French Clergy
Asser, John
Asses, Feast of
Assessor of the Holy Office
Assessors
Assicus, Saint
Assideans
Assimilation, Physiological
Assimilation, Psychological
Assisi -- Diocese in Umbria
Assistant at the Pontifical Throne
Assizes of Jerusalem
Assmayer, Ignaz
Association, Right of Voluntary
Association of Ideas
Association of Priestly Perseverance
Associations, Pious
Assuerus
Assumption, Augustinians of the
Assumption, Little Sisters of the
Assumption, Sisters of the
Assumption of Mary, Feast of the
Assumptionists
Assur (titular see)
Assur (multiple definitions)
Assyria
Assyrian Rite
Asterisk
Asterius
Asti -- Diocese in Italy
Aston
Astorga -- Diocese in Spain
Astrology
Astronomy
Astronomy in the Bible
Astros, Paul-Thérèse-David d' -- French cardinal (1772-1851)
Astruc, Jean
Atahuallpa
Atahualpa, Jean Santos
Atavism
Athanasian Creed, The
Athanasius, Saint -- Bishop of Alexandria, Confessor and Doctor of the Church (296-373)
Athabasca
Atheism
Athelney, The Abbey of
Athenagoras
Athenry
Athens, Christian
Athens, Modern Diocese of
Athias, Joseph
Athos, Mount
Atienza, Juan de
Atkinson, James -- English Catholic confessor (d. 1595)
Atkinson, Nicholas -- English priest and martyr (d. 1610)
Atkinson, Paul, of St. Francis
Atkinson, Sarah -- Irish philanthropist and biographer (1823-1893)
Atkinson, Ven. Thomas -- English martyr (d. 1616)
Atom
Atomism
Atonement, Day of
Atonement, Doctrine of the
Atrib
Atrium
Attainder
Attala, Saint
Attalia
Attaliates, Michael
Atticus
Attigny, Councils of
Attila the Hun
Attiret, Jean Denis
Atto
Atto of Pistoia
Atto of Vercelli
Attracta, Saint
Attributes, Divine
Attrition
Attuda
Aubarède, Jean-Michel-d'Astorg
Aubermont, Jean-Aontoine d'
Aubery, Joseph
Aubignac, François Hédelin, Abbé d'
Aubusson, Pierre d'
Auch
Auckland
Auctorem Fidei
Audiences, Pontifical
Audifax, Abachum, Martha, and Maris, Saints
Audiffredi
Audin, J.-M.-Vincent
Audisio, Guglielmo
Auditor
Audran
Auenbrugger, Leopold
Aufsees, Jobst Bernhard von
Auger, Edmond
Augilæ
Augsburg
Augsburg, Synods of
Augusta -- Titular see in Asia Minor
Augustin von Alfeld
Augustine, Rule of Saint
Augustine of Canterbury, Saint -- First Archbishop of Canterbury, Apostle of the English (d. 604)
Augustine of Hippo, Life of Saint
Augustine of Hippo, Teaching of Saint
Augustine of Hippo, Works of Saint
Augustinian Canons
Augustinians
Augustinians of the Assumption
Augustinus, Antonius
Augustinus-Verein, The
Augustopolis
Augustus
Augustus Abbey, Fort
Aulne Abbey -- Former French monastery
Aumbry
Aunarius, Saint
Aurea
Aurelian
Aureliopolis
Aurelius -- Archbishop of Carthage from 388 to 423
Aurelius Antoninus, Marcus
Aureoli, Petrus
Auriesville
Aurispa, Giovanni
Aurora Lucis Rutilat
Ausculta Fili
Ausonius, Decimus Magnus -- Professor and poet (310-394)
Austin, John
Australia
Austremonius, Saint -- Apostle and Bishop of Auvergne (c. 314)
Austro-Hungarian Monarchy, The
Authentic
Authenticity of the Bible
Authority, Civil
Authorized Version, The
Autocephali
Autos Sacramentales
Autpert, Ambrose
Autran, Joseph
Autun
Auxentius of Milan
Auxentius, Junior
Auxentius of Mopsuestia
Auxerre, Councils of
Auxiliary Bishop
Auxilius of Naples
Ava
Avancini, Nicola
Avarice
Avatar
Avaugour, Pierre du Bois, Baron d'
Ave Maria
Ave Maris Stella
Ave Regina
Avellino
Avellino, Saint Andrew
Avempace
Avendano, Fernando
Averbode -- Premonstratensian abbey
Averroes
Aversa, Diocese of
Avesta, The
Avesta, Theological Aspects of the
Avicebron
Avicenna
Avignon
Avignon, Councils of
Avignon, University of
Avila
Avila, Francisco de
Avila, Sancho de
Avitus, Saint -- Bishop of Vienne (d. 518)
Aviz, Order of -- Military body of Portuguese knights
Avranches, Council of
Avril, Philippe
Axum
Ayacucho, Diocese of
Ayeta, Fray Francisco de
Ayllón, Lucas Vésquez de
Aylward, James Ambrose Dominic
Aymará
Aymeric of Piacenza
Azara, Féliz de
Azaria, Aristaces
Azarias, Brother
Azevedo, Luiz de
Azor, Juan
Azores
Azotus
Aztecs
Azymes
Azymites
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