Catholic Encyclopedia · Alphabetical Index
O
Catholic Encyclopedia Entries Beginning with O
Browse the historic Catholic Encyclopedia through the complete O directory, preserved within the CatholicG33k reference library.
O
Catholic Encyclopedia Entries
Select an article below. Every entry remains inside the CatholicG33k Catholic Encyclopedia library.
CO
2 entriesCU
1 entryOA
6 entriesOB
16 entries- Obazine, Monastery of
- Obba
- Obedience
- Obedience, Religious
- Obedientiaries
- Oblate Sisters of Providence
- Oblates of Mary Immaculate
- Oblates of St. Francis de Sales
- Oblati, Oblatæ, Oblates
- Obligation
- O’Braein, Tighernach
- Obregonians
- Obreption
- O’Brien, Terence Albert
- O’Bruadair, David
- Observatory, Vatican
OC
17 entries- O’Callaghan, Edmund Bailey
- O’Carolan, Torlogh
- Occam, William of
- Occasionalism
- Occasions of Sin
- Occleve, Thomas
- Occult Art, Occultism
- Occurrence
- Oceania, Vicariate Apostolic of Central
- Ockham, William of
- O’Connell, Daniel
- O’Conor, Charles
- O’Conor, Charles
- Octavarium Romanum
- Octave
- O’Cullenan, Gelasius
- O’Curry, Eugene
OD
20 entries- O Deus Ego Amo Te
- O’Daly, Daniel
- O’Daly, Donogh Mór
- Odense, Ancient See of Odense
- Odescalchi, Carlo
- O’Devany, Cornelius
- Odilia, Saint
- Odilo, Saint
- Odin, John Mary
- Odington, Walter
- Odo of Cambrai, Blessed
- Odo of Canterbury
- Odo of Cheriton
- Odo of Glanfeuil
- Odo, Saint
- Odo, Saint
- O’Donnell, Edmund
- O’Donovan, John
- O’Dugan, John
- O’Dwyer, Joseph
OE
2 entriesOF
7 entriesOG
5 entriesOH
11 entriesOI
3 entriesOJ
1 entryOK
2 entriesOL
30 entries- Olaf Haraldson, Saint
- Oláh, Nicolaus
- Olba
- Old Catholics
- Old Chapter, The
- Old Hall (St. Edmund’s College)
- Old Testament
- Old Testament, Canon of the
- Oldcorne, Ven. Edward
- Oldenburg
- Oldham, Hugh
- Oldoini, Augustino
- O’Leary, Arthur
- Olenus
- Olesnicki, Zbigniew
- Olier, Jean-Jacques
- Olinda
- Oliva
- Oliva, Gian Paolo
- Olivaint, Pierre
- Oliver, George
- Olivet, Mount
- Olivetans
- Olivi, Pierre Jean
- Olivier de la Marche
- Ollé-Laprune, Léon
- Olmütz
- O’Loghlen, Michael
- Olympias, Saint
- Olympus
OM
6 entriesON
6 entriesOO
1 entryOP
8 entriesOQ
1 entryOR
68 entries- Oracle
- Oran
- Orange, Councils of
- Orange Free State
- Orange River
- Orans
- Orate Fratres
- Oratorio
- Oratory
- Oratory, French Congregation of the
- Oratory of Saint Philip Neri, The
- Orbellis, Nicolas d’
- Orcagna
- Orcistus
- Ordeals
- Order of Friars Minor (Bibliography)
- Ordericus Vitalis
- Orders, Holy
- Orders, The Military
- Ordinariate
- Ordinary
- Ordines Romani
- Oregon
- Oregon City
- O’Reilly, Bernard
- O’Reilly, Edmund
- O’Reilly, Edmund
- O’Reilly, Hugh
- O’Reilly, John Boyle
- O’Reilly, Myles William Patrick
- Oremus
- Orense
- Oresme, Nicole
- Organ
- Organic Articles, The
- Oria
- Oriani, Barnaba
- Oriental Study and Research
- Orientation of Churches
- Orientius
- Oriflamme
- Origen and Origenism
- Original Sin
- Orihuela
- Oriol, Saint Joseph
- Oristano
- Orkneys
- Orlandini, Niccolò
- Orléans
- Orléans, Councils of
- Orley, Barent Van
- Orme, Philibert de l’
- Oropus
- O’Rorke, Patrick Henry
- Orosius, Paulus
- Orphans and Orphanages
- Orsi, Giuseppe Agostino
- Orsini
- Orsisius
- Ortelius, Abraham
- Orthodox Church
- Orthodoxy
- Orthodoxy, Feast of
- Orthosias
- Ortolano Ferrarese
- Orval
- Orvieto
- Ory, Matthieu
OS
24 entries- O Salutaris Hostia
- Osaka
- Osbald
- Osbaldeston, Edward, Venerable
- Osbern
- Oscott (St. Mary’s College)
- Osee
- Osimo
- Oslo, Ancient See of
- Osma
- Osmund, Saint
- Osnabrück
- Ossat, Arnaud d’
- Ossory, Diocese of
- Ostensorium
- Ostia and Velletri
- Ostiensis
- Ostracine
- Ostraka, Christian
- Ostrogoths
- O’Sullivan Beare, Philip
- Oswald, Saint
- Oswald, Saint
- Oswin, Saint