| O ‘beth |
| O Lux Beata Trinitas |
| O Miranda Vanitas |
| O Sapientia! |
| O.S.F |
| Oahu |
| Oak |
| Oak of Reformation |
| Oak-worship |
| Oak, Council (or Synod) Of The |
| Oakes, Urian |
| Oannes |
| Oates, Titus |
| Oath |
| Oath (2) |
| Oath against Simony |
| Oath of a Christian |
| Oath of Abjuration |
| Oath of Allegiance |
| Oath of Canonical Obedience |
| Oath of Conformity and Obedience |
| Oath of Purgation |
| Oath of Supremacy |
| Oath, Burgess |
| Oaths of Allegiance and Supremacy |
| Obadiah |
| Obal |
| Obdia |
| Obduracy |
| Obe, Obeah, Or Obi |
| Obed |
| Obed-edom |
| Obedience |
| Obedience (Ecclesiastical) |
| Obedience of Christ |
| Obeirne, Thomas Lewis, D.D. |
| Obeisance |
| Oben |
| Ober-Ammergau |
| Obereit, Jakob Hermann |
| Oberhauser, Benedict |
| Oberkirchenrath |
| Oberlin Theology |
| Oberlin, Jean Frederic |
| Oberlin, Jeremiah James |
| Oberndorfer, Celestin |
| Oberrauch, Anton Nicolaus |
| Oberthur, Franz, Dr |
| Oberto, Francesco Di |
| Obi |
| Obi (2) |
| Obil |
| Obit |
| Obituary |
| Obizzini, Tommaso |
| Object |
| Objections To Christianity |
| Objective |
| Oblata |
| Oblates |
| Oblates (2) |
| Oblati |
| Oblation |
| Oblation (Christian) |
| Oblationarium |
| Obligation |
| Obligation (2) |
| Obligation, Feasts of |
| Obnaim |
| Oboth |
| Obotrites, Conversion Of The |
| Obrecht, Ulrich |
| Obregon, Bernard |
| Obregon, Pedro de |
| Obrien, James Thomas, D.D. |
| OBrien, John, D.D |
| OBrien, Matthew, D.D |
| OBryan, William |
| Obscene Prints, Books, Or Pictures |
| Obscurantists |
| Obsequens |
| Obsequies |
| Obsequium |
| Observantists |
| Observer of Times |
| Obsignatio |
| Ocampo, Florian D |
| Occam (Or Ockham), Nicholas Of |
| Occam, William of |
| Occasionalism |
| Occom, Sam(p)son |
| Oceanica |
| Oceanides And Oceanitides |
| Oceanus |
| Oceda, Samuel Ben-Israel |
| Ocellus, Lucanus |
| Ochiel |
| Ochiltree, Michael |
| Ochim |
| Ochino (Or, As He Is Sometimes Called, Ocello), Bernardino |
| Ochlah |
| Ocidelus |
| Ocina |
| Ockley, Simon |
| Ockwallists |
| Oclah ve-Oclah |
| Oconnor, Charles |
| OConnor, Michael, D.D |
| Ocran |
| Octagonal Chapels Or Churches |
| Octava Infantium |
| Octave |
| Octavian |
| Octavianus Or Octavius |
| October-Horse |
| Octoechos |
| Od |
| Odal Or Udal Right |
| ODaly, Daniel |
| Odd-fellows |
| Oddazzi (Or Odasi), Giovanni |
| Ode |
| Oded |
| Odem |
| Odenheimer, William Henry, D.D |
| Oderic Of Pordenone (Or Portenau) |
| Oderico, Canonico |
| Odescalchi, Benedetto |
| Odescalchi, Marc Antoliio |
| Odescalchi, Thomas |
| Odians |
| Odilia, St. |
| Odilo, De Mercoeur |
| Odilon |
| Odin |
| Odin, John Mary, D.D |
| Odington, Walter |
| Odo |
| Odo (St.) Of Kent (Or Cantianus) |
| Odo Cantianus |
| Odo De Conteville |
| Odo Of Cambria |
| Odo Of Chiteauroux |
| Odo Of Deuil |
| Odo Of Fosses |
| Odo Of Morimond |
| Odo Of Soissons |
| Odo, Clement |
| Odoacer |
| Odollam |
| Odolric Of Saint-Martial |
| Odonarkes |
| Odontius, Paul |
| Odor, Sweet |
| Odoran(ne) |
| Odylism |
| Oecolampadius, Johannes |
| Oeconomists |
| Oeconomus |
| Oeconomy |
| Oecumenical (Or Universal) Bishop |
| Oecumenical Council |
| Oecumenical Divines |
| Oecumenical Judge |
| Oecumenius |
| Oeder, Georg Ludwig |
| Oedmann, Samuel |
| Oegir |
| Oehler, Gustav Friedrich |
| Oehlmuller, Daniel Joseph |
| Oelreich, Bernhard |
| Oelrichs, Johann Georg Arnold |
| Oemler, Christian Wilhelm |
| Oenisteria |
| Oenoatis |
| Oenomancy |
| Oenomania |
| Oenomaus |
| Oertel, Euchlin Friedrich Christian |
| Oertel, Philipp Friedrich Wilhelm |
| Oetinger, Friedrich Christoph |
| Oetosynus |
| Oettinger, Edward Maria |
| Ofarri |
| Offa |
| Offa Of Essex |
| Offence |
| Offence, Ecclesiastical |
| Offenhausen, Salomon Zebi |
| Offering |
| Offering-days |
| Offerings |
| Offertorium |
| Offertory |
| Office |
| Office of the Church |
| Office, (The) Divine |
| Office, Holy, Congregation Of The |
| Office, Ministerial |
| Officer |
| Officers of the Church |
| Offices |
| Offices of Christ |
| Official |
| Officium Divinum |
| OFihely, Maurice |
| Og |
| Ogden, Benjamin |
| Ogden, John W |
| Ogden, Joseph Meeker, D.D |
| Ogden, Samuel |
| Ogden, Thomas Spencer |
| Ogden, Uzal, D.D. |
| Ogee Or Ogyve |
| Oggel, Pieter John |
| Oggione (Or Uggione), Marco Da |
| Ogilby, Frederick, D.D |
| Ogilby, John David, D.D. |
| Ogilvie (Or Ogilby), John (2), D.D., F.R.S. |
| Ogilvie, John (1), D.D. |
| Oglesby, Joseph |
| Ogoa |
| OGorman, James, D.D. |
| Ohad |
| Ohaloth |
| OHanly, Donat |
| OHanly, Samuel |
| Ohel |
| Ohmacht, Landelin |
| Oiconomists |
| Oiconomos, Constantin |
| Oikoi Basileioi |
| Oil |
| Oil-press |
| Oil-tree |
| Oinomania |
| Ointment |
| Oiot |
| Oisel, Philip |
| Ojibway Version |
| OKelly Methodists |
| OKelly, James |
| Okely, Francis |
| Oken, Lorenz |
| Oketsim |
| Okki |
| Oklah |
| Okszi, Stanislas |
| Olaf, Engelbrechtson |
| Olaf, Haraldson |
| Olaf, Tryggveson |
| Olahus, Nicholas |
| Olamus |
| Olaus, John |
| Olaus, Magnus |
| Old |
| Old and New Light Controversy |
| Old Believers |
| Old Calabar |
| Old Catholics |
| Old Dissenters |
| Old Flemings |
| Old Lutherans |
| Old Man Of Obi |
| Old Man of the Mountain |
| Old Testament |
| Old-Light Antiburghers |
| Old-Light Burghers |
| Old-School Baptists |
| Old-School Presbyterians |
| Oldcastle, Sir John |
| Oldenburg |
| Oldendorp, Christian George Andreas |
| Oldermann, Johann |
| Oldfield, Joshua, D.D. |
| Oldham, Hugh |
| Oldoni, Boniforte And Ercole |
| Oldrin, Edward |
| Olds, Gamaliel Smith |
| Olearius |
| OLeary, Arthur |
| Oleaster, Geronimo |
| Olesnicki, Nicholaus |
| Olevianus, Caspar |
| Oley, Barnabas |
| Olga, St. |
| Oliba Of Vic |
| Olibanum |
| Olier, Jean Jacques |
| Olin, Stephen, D.D., LL.D. |
| Olindo, Martino De |
| Oliva |
| Oliva, Alessandro |
| Oliva, Fernand Perez de |
| Olive |
| Olive-Berry |
| Olive-Fat |
| Olive-Oil |
| Olive-Yard |
| Olive, Pierre Jean |
| Olive, Wild |
| Oliver Of Malmesbury |
| Oliver, George, D.D |
| Oliver, John |
| Olivers, Thomas |
| Olives, Mount of |
| Olivet |
| Olivet, Pierre Joseph |
| Olivetan, Pierre Robert |
| Olivetans |
| Oliveyra, Francisco Xavier de |
| Oliveyra, Salomon de, Ben-David |
| Olivier, Cardinal |
| Olivier, Jean |
| Olivier, Nicolas Theodore |
| Olivier, Seraphin |
| Olivieri, Augustin |
| Olivieri, Domenico |
| Ollier, Pierre |
| Ollivant, Alfred, D.D |
| Olmstead, James Munson, D.D. |
| Olmstead, Lemuel Gregory, LL.D |
| Olof, Skotkonung |
| Olonetzian Version |
| Olonne, Jean-Marie D |
| Olotzaga, Juan De |
| Olshausen, Detlev Johann Wilhelm |
| Olshausen, Hermann |
| Olshausen, Justus |
| Olympas |
| Olympia Morata |
| Olympiad |
| Olympic Games |
| Olympiodorus Of Alexandria |
| Olympiodsrus |
| Olympius |
| Olympius (2) |
| Olzoffski, Andrew |
| Om |
| Omadius |
| Omaerus |
| Oman |
| Omar |
| Omar, Abu-Hafsa, Ibn Al-Khatab |
| Ombay, Or Maloewa |
| Ombiasses |
| Ombrius |
| Ombwiri |
| Omega |
| Omen |
| Omer |
| Omer (St.), Ecclesiastical Council Of |
| Omer, St., Audomarus |
| Omish Church |
| Omnibonus |
| Omnipotence |
| Omnipresence |
| Omniscience |
| Omophagia |
| Omophorium |
| Omphalopsuchi |
| Omri |
| On |
| Onachus (or Onacus) |
| Onam |
| Onan |
| Onca |
| Oncacus |
| Oncken, John Gerhard, D.D |
| Onderdonk, Benjamin Treadwell D.D., LL.D. |
| Onderdonk, Henry Ustic M.D., D.D. |
| Oneida Community |
| Oneirocritica |
| Oneiromancy |
| Onesimus |
| Onesimus St. |
| Onesiphorus |
| Oniares |
| Onias |
| Onias, City Or Region Of |
| Onias, Ham-Magal |
| Onion |
| Onkelos The Proselyte |
| Only-begotten |
| Ono |
| Ono (2) |
| Onolatry |
| Onomacritus |
| Onquenira, Isaac Ben-Moses |
| Ontology |
| Onuphis |
| Onuphrius, Panvinius |
| Onuphrius, St |
| Onus |
| Onyambe |
| Onycha |
| Onychomancy |
| Onymus, Adam Joseph |
| Onyx |
| Oojein Version |
| Ooms, Jean Baptiste |
| Oonsell, Guillaume Van |
| Oort, Lambrecht Van |
| Ooscopy |
| Oost, Jacob van The Elder |
| Oost, Jacob van, The Younger |
| Oosterzee, Johann Jacob Van |
| Opalia |
| Open-air Preaching |
| Opera Supererogationis |
| Operatio Sacra |
| Operation of the Holy Ghost |
| Operation of the Mind |
| Opfergeld Friedrich |
| Ophel |
| Opher |
| Ophereth |
| Ophiomancy |
| Ophir |
| Ophites |
| Ophni |
| Ophni (2) |
| Ophrah |
| Ophrai |
| Opinion |
| Opitz (Opitius), Heinrich |
| Opitz, Martin |
| Opitz, Paul Friedrich |
| Oporin, Joachim |
| Oppelt, Godfrey Sebastian |
| Oppenheim, David |
| Oppenheimer, Eberhard Carl Friedrich |
| Oppeniheim(er), David ben-Abraham |
| Opportune |
| Opposants |
| Oppression |
| Ops |
| Optatus |
| Optimism |
| Optimists |
| Optimus, Heinrich |
| Option |
| Opus |
| Opus Operantis |
| Opus Operatum |
| Opus Supererogationis |
| Oquamiris |
| Or Thaumaturgus |
| Or-Sarua, Isaac Ben-Moses |
| Oracle |
| Oracles |
| Oral Confession |
| Oral Law |
| Oral Manducation |
| Orale |
| Orandi Disciplina |
| Orange (River) Free State |
| Orange, Council of |
| Orangemen |
| Orantes |
| Orarium |
| Orate, Fratres |
| Orations, Funeral And Pulpit |
| Orator |
| Oratorio |
| Oratorium |
| Oratory |
| Oratory, Priests (Or Fathers) Of The |
| Orbison, Thomas |
| Orcagna, Or LArcagnuolo |
| Orchard |
| Orchard, Nicholas |
| Ordeals, Or Ordeal-Trials |
| Order |
| Order Of |
| Ordericus, Vitalus |
| Orders, Holy |
| Orders, Religious |
| Ordibarii |
| Ordinal |
| Ordinance |
| Ordinances Of The Gospel |
| Ordinances, Christian |
| Ordinary |
| Ordination |
| Ordination of Ministers |
| Ordo |
| Ordo Romanus |
| Ordo Salutis |
| Ore |
| Oreads |
| Oreb |
| Oreb (2) |
| Oreb (2) |
| Oreb, The Rock |
| Oreb, The Rock (2) |
| Orebites Or Horebites |
| Oregim |
| Oregio, Agostino |
| OReilly, Bernard, D.D |
| Oremus |
| Oren |
| Oren (2) |
| Orenburg |
| Orenburg-Tartar Version Of The Scripture |
| Oresme, Nicolas |
| Orestes |
| Orfand, Jacinto |
| Organ |
| Organ-Cases |
| Organa, Andrea |
| Orgia |
| Oriel Or Oriole |
| Orient |
| Oriental Churches |
| Oriental Languages |
| Oriental Literature And Languages |
| Oriental Liturgy |
| Oriental Philosophy |
| Orientation |
| Oriflamme |
| Origen |
| Origenian Controversy |
| Origenians |
| Origenism |
| Origenists |
| Origin of Evil |
| Origin of Man |
| Origin of Species |
| Original Antiburghers |
| Original Burghers |
| Original Seceders (1) (Associate Synod Of) |
| Original Seceders (2) (Synod Of United) |
| Original Sin |
| Orioli, Bartolomeo |
| Orion |
| Orion (2) |
| Orissa |
| Orissa Version |
| Orkney Islands |
| Orlah |
| Orlandini, Niccolo |
| Orlando, Bernardo |
| Orlay, Bernard Van |
| Orleans |
| Orley, Jean Van |
| Orman, Samuel L. |
| Orme, William |
| Ormerod, Oliver |
| Ormond, William |
| Ormuzd And Ahriman |
| Ornamatuas Tus |
| Ornament |
| Ornaments (Or Decorations), Architectural |
| Ornaments, Ecclesiastical |
| Ornan |
| Ornithomancy |
| Oro |
| Orobio, Isaac De Castro |
| Orosius, Paulus |
| Oroth |
| Orpah |
| Orphan |
| Orphanages Or Orphan Asylums |
| Orphans |
| Orpheotelists |
| Orpheus |
| Orphic Mysteries |
| Orphrey |
| Orr, James M |
| Orr, Robert |
| Orrente, Pedro |
| Orsi, Benedetto |
| Orsi, Bernardino |
| Orsi, Giuseppe Agostino |
| Orsi, Lelio |
| Orsi, Prospero |
| Orsini |
| Ortega |
| Ortega, Raymundo |
| Orthodox |
| Orthodoxy And Heterodoxy |
| Orthodoxy, Feast of |
| Orthosias |
| Ortiz, Alonso |
| Ortlibenses |
| Orton, Azariah G. D.D |
| Orton, Job, S.T.P. |
| Orus |
| Orvis, Samuel |
| Oryx |
| Orzechowski, Stanislaus |
| Osaias |
| Osbaldistan, Richard |
| Osband, Gideon |
| Osbern(e) Of Canterbury |
| Osbern(e) Of Gloucester |
| Osbernus, Claudianus |
| Osbon, Abiathar Mann, D.D |
| Osborn, Chauncey |
| Osborn, Jeremiah |
| Osborn, Samuel |
| Osborn, Theron |
| Osborne, Ethan |
| Osborne, Lord Sydney Godolphin |
| Osborne, Michael |
| Oscar I, King Of Sweden And Norway |
| Oschophoria |
| Osculatorium |
| Osea |
| Osgood, David D.D. |
| Osgood, S.M., D.D |
| Osgood, Samuel (1), D.D |
| Osgood, Samuel (2), D.D., LL.D |
| Osgood, Thaddeus |
| Oshea |
| Oshima |
| Osiander |
| Osiander, Andreas (1) |
| Osiander, Andreas (2) |
| Osiander, Johann Adam (1) |
| Osiander, Johann Adam (2) |
| Osiander, Lucas (1) |
| Osiander, Lucas (2) |
| Osiandrians |
| Osiris |
| Oski, Reuben |
| Osmond Or Osmund St. |
| Osorio (Or Osorius), Geronimo (1) |
| Osorio, Francisco Meneses |
| Osorio, Geronimo (2) |
| Ospray |
| Ossa |
| Ossat Arnaud D |
| Ossenians |
| Ossifrage |
| Ossilago |
| Ossilegium |
| Ossipaga |
| Ossitinian Version |
| Ossuarium |
| Oster, P. J |
| Ostertag, Paul Albert, Dr |
| Osterwald, Jean Frederic |
| Ostiarii |
| Ostjakian Version |
| Ostrander, Daniel |
| Ostrander, Henry, D.D |
| Ostrich |
| Oswald Of Worcester |
| Oswald, Heinrich Siegmund |
| Oswald, St. |
| Otey, James Hervey, D.D |
| Otfried |
| Othlo |
| Othman I And III |
| Othman, Ibn-Affan |
| Othmar, St |
| Othni |
| Othniel |
| Otho And Otto Of Freising(en) |
| Otho I |
| Otho II |
| Otho III |
| Otho IV |
| Otho Or Otto St., Of Bamberg |
| Otho, Georg |
| Otho, Johannes Heinrich |
| Otho, Julius Conrad |
| Othobon, Synod of |
| Othonias |
| Otji (Tschi, or Twi) Version Of The Scriptures |
| Otji-herero Version Of The Scriptures |
| Otolengo, Samuel Ben-David Ben-Jechiel, Of Casale |
| OToole (Or Tuathal), Laurence |
| Otshirbani |
| Ott, Johann Baptist |
| Ott, Johann Heinrich |
| Ottaviani, Carlo |
| Ottaviani, Giovanni |
| Ottensosser, David |
| Otter, William, D.D |
| Otterbein, Philip William |
| Otterson, James |
| Otther, Jacob |
| Ottilia, St. |
| Ottini, Felice |
| Ottini, Pasquale |
| Otto Of Bamberg |
| Otto Of Freising |
| Otto Of Passau |
| Otto, Leopold Martin Von |
| Ouch |
| Oude Or Oudh |
| Oudin, Casimir |
| Ouen, St |
| Oughtred, William |
| Oulih, Gerson Ashkenazi |
| Our Lady of Mercy, Sisters of |
| Ouseel, Philipp |
| Ouseley, Gideon |
| Outram (Or Owtram), William, D.D. |
| Outrein, Johann D |
| Outremont, Hector Albert Chaulet D |
| Ouvrard, Rene |
| Ouvrier, Ludwig Benjamin |
| Ovalle |
| Ovampoland |
| Ovampos |
| Ovation |
| Oven |
| Overall, John |
| Overbagh, Peter A |
| Overbeck, Friedrich |
| Overberg, Bernhard |
| Overbury Sir Thomas |
| Overkamp, Georg Wilhelm |
| Overseer |
| Overseer (2) |
| Overton, Samuel |
| Oviedo, Council Of |
| Ovington, John |
| Owen (Or Owings) |
| Owen, Anning |
| Owen, Francis A., D.D |
| Owen, Griffith |
| Owen, Henry M.D. |
| Owen, Isaac, D.D |
| Owen, James |
| Owen, John (1) |
| Owen, John (2) |
| Owen, John Jason D.D., LL.D. |
| Owen, Joseph, D.D |
| Owen, Lewis |
| Owen, Robert |
| Owen, William |
| Owens, Thomas |
| Owings, Richard |
| Owl |
| Owl-headed Minerva |
| Ox |
| Ox (2) |
| Ox (2) (2) |
| Ox-Goad |
| Ox, Wild |
| Oxenbridge, John |
| Oxendine, Alexander W. |
| Oxenstiern |
| Oxford Tracts |
| Oxford, Councils of |
| Oxlee, John |
| Oxygraphus |
| Ozanam, Antoine Frederic |
| Ozem |
| Ozias |
| Oziel |
| Ozni |
| Oznite |
| Ozniyah |
| Ozora |
