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THE CATHOLIC ENCYCLOPEDIA

O
Oakeley-Ozias

Frederick Oakeley
O Antiphons
Oates's Plot
Oaths
English Post-Reformation Oaths
Archdiocese of Oaxaca
Monastery of Obazine
Obba
Obedience
Religious Obedience
Obedientiaries
Oblate Sisters of Providence
Oblates of Mary Immaculate
Oblates of Saint Francis de Sales
Oblati
Obligation
Tighernach O'Braein
Obregonians
Obreption
Terence Albert O'Brien
David O'Bruadair
Edmund Bailey O'Callaghan
Torlogh O'Carolan
Occasionalism
Occasions of Sin
Thomas Occleve
Occult Art, Occultism
Occurrence
Vicariate Apostolic of Central Oceania
Daniel O'Connell
Charles O'Conor (1)
Charles O'Conor (2)
Octavarium Romanum
Octave
Gelasius O'Cullenan
Eugene O'Curry
Daniel O'Daly
Donogh Mór O'Daly
Ancient See of Odense
Carlo Odescalchi
O Deus Ego Amo Te
Cornelius O'Devany
St. Odilia
St. Odilo
John Mary Odin
Walter Odington
St. Odo
St. Odo (Oda)
Odo
Edmund O'Donnell
John O'Donovan
Bl. Odo of Cambrai
Odo of Canterbury
Odo of Cheriton
Odo of Glanfeuil
John O'Dugan
Joseph O'Dwyer
Johann Œcolampadius
Episcopal œconomus
Œcumenius
John James Maximilian Oertel
Oettingen
Offa
Offerings
Offertory
Divine Office
Office of the Dead
Maurice O'Fihely
O Filii et Filiæ
Diocese of Ogdensburg
Marco D'Oggione
Ven. John Ogilvie
Diocese of Ogliastra
Eugene O'Growney
John O'Hagan
Thomas O'Hagan
John O'Hanlon
Theodore O'Hara
Patrick O'Hely
Thomas O'Herlahy
Ambrose Bernard O'Higgins
Ohio
Aloys Karl Ohler
Dermod O'Hurley
Maelbrighte O'Hussey
Oil of Saints
Ointment in Scripture
Alonso de Ojeda
Jean d'Okeghem
Oklahoma
St. Olaf Haraldson
Nicolaus Oláh
Olba
Old Catholics
Old Chapter
Ven. Edward Oldcorne
Oldenburg
Old Hall (St. Edmund's College)
Hugh Oldham
Augustino Oldoini
Arthur O'Leary
Olenus
Zbigniew Olesnicki
Jean-Jacques Olier
Diocese of Olinda
Oliva
Gian Paolo Oliva
Pierre Olivaint
George Oliver
Mount Olivet
Olivetans
Pierre Jean Olivi
Olivier de la Marche
Léon Ollé-Laprune
Archdiocese of Olmütz
Michael O'Loghlen
St. Olympias
Olympus
Diocese of Omaha
Ombus
Kathleen O'Meara
St. Omer
Omission
Omnipotence
Hugh O'Neill
Owen Roe O'Neill
Onias
Ontario
Ontologism
Ontology
Shrine of Oostacker
Ophir
Diocese of Oporto
Gilles-Marie Oppenordt
Diocese of Oppido Mamertina
St. Optatus
Optimism
Right of Option
Malachias O'Queely
Oracle
Diocese of Oran
Councils of Orange
Orange Free State
Vicariate Apostolic of Orange River
Orans
Orate Fratres
Oratorio
Oratory
Oratory of Saint Philip Neri
Nicolas d'Orbellis
Orcagna
Orcistus
Ordeals
Ordericus Vitalis
Holy Orders
Ordinariate
Ordinary
Ordines Romani
Oregon
Archdiocese of Oregon City
Bernard O'Reilly
Edmund O'Reilly (1)
Edmund O'Reilly (2)
Hugh O'Reilly
John Boyle O'Reilly
Myles William Patrick O'Reilly
Oremus
Diocese of Orense
Nicole Oresme
Organ
Diocese of Oria
Barnaba Oriani
Oriental Study and Research
Orientation of Churches
Orientius
Oriflamme
Origen and Origenism
Original Sin
Diocese of Orihuela
St. Joseph Oriol
Diocese of Oristano
Orkneys
Niccolò Orlandini
Councils of Orléans
Diocese of Orléans
Barent Van Orley
Philibert de l'Orme
Oropus
Patrick Henry O'Rorke
Paulus Orosius
Orphans and Orphanages
Giuseppe Agostino Orsi
Orsini
Orsisius
Abraham Ortelius
Orthodox Church
Orthodoxy
Feast of Orthodoxy
Orthosias
Ortolano Ferrarese
Orval
Diocese of Orvieto
Matthieu Ory
Diocese of Osaka
O Salutaris Hostia
Osbald
Ven. Edward Osbaldeston
Osbern
Oscott (St. Mary's College)
Osee
Diocese of Osimo
Ancient See of Oslo
Diocese of Osma
St. Osmund
Diocese of Osnabrück
Arnaud d'Ossat
Diocese of Ossory
Ostensorium
Suburbicarian Diocese of Ostia and Velletri
Ostiensis
Ostracine
Christian Ostraka
Ostrogoths
Philip O'Sullivan Beare
St. Oswald (1)
St. Oswald (2)
St. Oswin
Otfried of Weissenburg
Othlo
St. Othmar
Marcus Salvius Otho
Archdiocese of Otranto
Archdiocese of Ottawa
University of Ottawa
St. Otto
Otto I, the Great
Otto II
Otto III
Otto IV
Ottobeuren
Otto of Freising
Otto of Passau
Otto of St. Blasien
St. Ouen
Feast of Our Lady, Help of Christians
Feast of Our Lady of Good Counsel
Brothers of Our Lady of the Fields
Feast of Our Lady of the Snow
Friedrich Overbeck
Bernhard Heinrich Overberg
Diocese of Oviedo
Nicholas Owen
John Oxenford
Henry Nutcombe Oxenham
Oxford
University of Oxford
Oxford Movement (1833-1845)
Oxyrynchus
Antoine-Frédéric Ozanam
Jacques Ozanam
Ozias







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