P
- Pablo Jose Arriaga
- Pacandus
- Pacificus
- Paderborn
- Padua
- Paganism
- Pakawa Indians
- Palaeography
- Palaeontology
- Palatini
- Palawan
- Palencia
- Paleopolis
- Palermo
- Palestrina
- Pall
- Palladius
- Pallium
- Palm in Christian Symbolism
- Palm Sunday
- Palma Vecchio
- Palmyra
- Paltus
- Pamelius
- Pamiers
- Pamphilus of Caesarea
- Pamplona
- Panama
- Pandects
- Pandulph
- Panemotichus
- Pange Lingua Gloriosi
- Pano Indians
- Panopolis
- Panpsychism
- Pantaenus
- Pantheism
- Paolo Agostini
- Paolo Caliari
- Paolo Dal Pozzo Toscanelli
- Paolo Farinato
- Paolo Paruta
- Paolo Ruffini
- Paolo Sarpi
- Paolo Segneri, the Elder
- Paolo Vergani
- Papacy
- Papago Indians
- Papal Arbitration
- Papal Consistory
- Papal Constitutions
- Papal Decretals
- Papal Diplomatics
- Papal Elections
- Papal Mint
- Papal Regesta
- Papal Rescripts
- Paphnutius
- Paphos
- Parables
- Parabolani
- Paraclete
- Paraetonium
- Paraguay
- Parahyba
- Paralipomenon (Chronicles)
- Parallelism
- Paralus
- Parana
- Parasceve
- Paray-Le-Monial
- Pardons of Brittany
- Parents
- Parenzo-Pola
- Paris
- Paris de Grassis
- Parish
- Parium
- Parlais
- Parma
- Parnassus
- Parochial Mass
- Parochial Registers
- Paroecopolis
- Parsis
- Particular Judgment
- Partnership
- Paschal Candle
- Paschal III
- Paschal Lamb
- Paschal Tide
- Pasquale Galluppi
- Pasquier Quesnel
- Passau
- Passion Music
- Passion Offices
- Passion Plays
- Passion Sunday
- Passionists
- Passions
- Passiontide
- Passos
- Passover
- Pasto
- Pastor
- Pastoral Theology
- Patagonia
- Patara
- Paten
- Patmos
- Patras
- Patriarch
- Patriarch and Patriarchate
- Patriarchate of the East Indies
- Patrician Brothers
- Patrick Anderson
- Patrick Barry
- Patrick Benedict Zimmer
- Patrick Donahoe
- Patrick Fleming
- Patrick Graham
- Patrick Henry O'Rorke
- Patrick John Ryan
- Patrick Murray
- Patrick O'Hely
- Patrick Robert Guiney
- Patrick S. Casserly
- Patrick Sarsfield
- Patrick Sarsfield Gilmore
- Patrick Walsh
- Patritius Sporer
- Patrizius Wittman
- Patrology
- Patron and Patronage
- Patron Saints
- Patti
- Paul Allard
- Paul Atkinson of St. Francis
- Paul Bachmann
- Paul Cullen
- Paul de Barry
- Paul de Chomedey de Maisonneuve
- Paul de Sorbait
- Paul Gabriel Antoine
- Paul Godet Des Marais
- Paul Heliae
- Paul Laymann
- Paul Majunke
- Paul Maroni
- Paul Melchers
- Paul of Burgos
- Paul of Middelburg
- Paul of Samosata
- Paul Pelisson-Fontanier
- Paul Ragueneau
- Paul Scarron
- Paul the Deacon (Paulus Diaconus)
- Paul-Henri-Corentin Feval
- Paul-Maximilien-Emile Littre
- Paul-Quentin Desains
- Paul-Therese-David d'Astros
- Paulicians
- Paulin Martin
- Pauline Mallinckrodt
- Pauline-Marie Jaricot
- Paulinus a S. Bartholomaeo
- Paulinus of Pella
- Paulist Fathers
- Paulists
- Paulus Barbus
- Paulus Bril
- Paulus Jovius
- Paulus Orosius
- Paulus Venatus
- Pavia
- Pax
- Pax in the Liturgy
- Peace Congresses
- Peace of the Church
- Pearl Mary Teresa Craigie
- Peba Indians
- Pectoral
- Pectorale
- Pectorius of Autun
- Pednelissus
- Pedralvarez Cabral
- Pedro Abarca
- Pedro Angulo
- Pedro Antonio de Alarcon
- Pedro Arias de Avila
- Pedro Calderon de la Barca
- Pedro Campana
- Pedro d'Alva y Astorga
- Pedro da Fonseca
- Pedro de Alvarado
- Pedro de Anazco
- Pedro de Calatayud
- Pedro de Cordova
- Pedro de Luna
- Pedro de Ribadeneira
- Pedro Diaz
- Pedro Gonzalez de Mendoza
- Pedro Nunez (Nonius)
- Pelagia
- Pelagius and Pelagianism
- Pelagius II
- Pella
- Pellegrino Rossi
- Pellegrino Tibaldi
- Pelotas
- Pelusium
- Pembroke
- Penal Laws
- Penance (as a Virtue)
- Penelakut Indians
- Penitential Canons
- Penitential Orders
- Penitential Redemptions
- Penne and Atri
- Pennsylvania
- Penobscot Indians
- Pentacomia
- Pentapolis
- Pentateuch
- Pentecost
- Pentecost (Jewish Feast)
- Peoria
- Peoria Indians
- Pepin the Short
- Peregrinus
- Pergamus
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- Pericui Indians
- Perigueux
- Periodi
- Periodical Literature in the United States
- Periodical Literature of Portugal
- Periodical Literature, Austria
- Periodical Literature, Belgium
- Periodical Literature, Canada
- Periodical Literature, England
- Periodical Literature, France
- Periodical Literature, Germany
- Periodical Literature, Holland
- Periodical Literature, Ireland
- Periodical Literature, Italy
- Periodical Literature, Mexico
- Periodical Literature, Poland
- Periodical Literature, Scotland
- Periodical Literature, Spain
- Periodical Literature, Switzerland
- Perjury
- Perpetual Adoration
- Perpetual Adorers of the Blessed Sacrament
- Perpignan
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- Persia
- Person
- Person Gobelinus
- Personality
- Perth
- Pertinax
- Peru
- Perugia
- Perugino
- Pesaro
- Pescennius Niger
- Pescia
- Pessimism
- Pessinus
- Pestalozzi and Pestalozzianism
- Peter Abelard
- Peter Aloys Gratz
- Peter Ambarach
- Peter Augustine Baines
- Peter Blomevenna
- Peter Cantor
- Peter Cellensis
- Peter Comestor
- Peter Cornelius
- Peter de Blois
- Peter de Honestis
- Peter de Regalado
- Peter de Vinea
- Peter Dens
- Peter Donders
- Peter Faber
- Peter Fullo
- Peter Gallwey
- Peter Gandolphy
- Peter George Niger
- Peter Hardeman Burnett
- Peter Hasslacher
- Peter Hubert Evermode Backx
- Peter Hutton
- Peter John Sullivan
- Peter Joseph Arnoudt
- Peter Lambeck
- Peter Lombard
- Peter Lombard
- Peter Marchant
- Peter Martyr d'Anghiera
- Peter Michael Brillmacher
- Peter Mongus
- Peter of Alexandria
- Peter of Aquila
- Peter of Auvergne
- Peter of Bergamo
- Peter of Poitiers
- Peter Paludanus
- Peter Paul Maria Alberdingk Thijm
- Peter Paul Rubens
- Peter Pazmany
- Peter Philips
- Peter Ramus
- Peter Reichensberger
- Peter Roh
- Peter Schoffer
- Peter Skarga
- Peter Stephen Duponceau
- Peter Talbot
- Peter the Hermit
- Peter van de Velde
- Peter van Der Bosch
- Peter van Hove
- Peter Vischer
- Peter Walsh
- Peterborough
- Peterspence
- Petinessus
- Petitions To the Holy See
- Petra
- Petrobrusians
- Petropolis
- Petrus Alphonsus
- Petrus Aureoli
- Petrus Bernardinus
- Petrus Boeri
- Petrus de Natalibus
- Petrus Diaconus
- Petun Nation
- Pez, Bernhard and Hieronymus
- Pforta
- Phacusa
- Pharao
- Pharbaetus
- Pharisees
- Pharsalus
- Phaselis
- Phasga
- Phenomenalism
- Philadelphia
- Philanthropinism
- Philemon
- Philibert de l'Orme
- Philibert de l'Orme
- Philibert Vrau
- Philip Aranda
- Philip Calvert
- Philip Faber
- Philip Fisher
- Philip Henry Sheridan
- Philip II
- Philip II (King of Spain)
- Philip IV (The Fair)
- Philip Michael Ellis
- Philip O'Sullivan Beare
- Philip of the Blessed Trinity
- Philip Powel
- Philip Repington
- Philip the Arabian
- Philip Thomas Howard
- Philipp Johann Gustav von Jolly
- Philipp Melancthon
- Philipp Veit
- Philippe Alegambe
- Philippe Avril
- Philippe de Commines
- Philippe de La Hire
- Philippe du Contant de la Molette
- Philippe Pierson
- Philippe-Andre Grandidier
- Philippe-Aubert de Gaspe
- Philippi
- Philippi
- Philippine Islands
- Philippine-Rose Duchesne
- Philippopolis
- Philippopolis
- Philistines
- Phillipe L'Abbe
- Philo of Alexandria
- Philomelium
- Philosophy
- Philosophy of Common Sense
- Philosophy of Immanuel Kant
- Philoxenus
- Phoenecia
- Photinus
- Photius of Constantinople
- Phylacteries
- Physical Effects of Abortion
- Physical Effects of Abstinence
- Physiocrats
- Physiological Assimilation
- Physiologus
- Piacenza
- Piatto Cardinalizio
- Piatus of Mons
- Piauhy
- Piazza Armerina
- Piazzi
- Pichler
- Pickering
- Picture Bibles
- Pie Pelicane, Jesu, Domine
- Piedmont
- Piel
- Pier Paolo Vergerio, the Elder
- Pierfrancesco Scarampi
- Pierius
- Piero Da San Sepolcro
- Pierre Bailloquet
- Pierre Bedard
- Pierre Belain, Sieur d'Esnambuc
- Pierre Bercheure
- Pierre Berenger
- Pierre Berland
- Pierre Bertrand
- Pierre Biard
- Pierre Boucher
- Pierre Brugiere
- Pierre Brumoy
- Pierre Buse
- Pierre Cally
- Pierre Chaignon
- Pierre Charron
- Pierre Chastellain
- Pierre Cholonec
- Pierre Corneille
- Pierre Coton
- Pierre Coustant
- Pierre d'Ailly
- Pierre d'Aubusson
- Pierre de Berulle
- Pierre de Brantome, Seigneur de Bourdeille
- Pierre de Jarric
- Pierre de Lauzon
- Pierre de Marca
- Pierre de Maricourt
- Pierre de Ronsard
- Pierre de Voyer d'Argenson
- Pierre Denaut
- Pierre Dore
- Pierre du Bois, Baron d'Avaugour
- Pierre Francois Xavier de Ram
- Pierre Gassendi
- Pierre Gibault
- Pierre Gustave Toutant Beauregard
- Pierre Helyot
- Pierre Heude
- Pierre Jean Olivi
- Pierre Lagrene
- Pierre Le Moyne, Sieur d'Iberville
- Pierre Lescot
- Pierre Mignard
- Pierre Millet
- Pierre Nicole
- Pierre Olivaint
- Pierre Pithou
- Pierre Puget
- Pierre Puvis de Chavannes
- Pierre Raffeix
- Pierre Sylvain Regis
- Pierre Talon
- Pierre Tarisel
- Pierre Vernier
- Pierre Willems
- Pierre-Andre Latreille
- Pierre-Antoine Berryer
- Pierre-Charles l'Enfant
- Pierre-Charles-Francois Dupin
- Pierre-Daniel Huet
- Pierre-Guerin Tencin
- Pierre-Guillaume-Frederic Le Play
- Pierre-Herman Dosquet
- Pierre-Jean Beckx
- Pierre-Jean de Smet
- Pierre-Joseph Chaumonot
- Pierre-Joseph Desault
- Pierre-Joseph Pelletier
- Pierre-Joseph van Beneden
- Pierre-Joseph-Octave Chauveau
- Pierre-Lambert Goossens
- Pierre-Martial Cibot
- Pierre-Paul Royer-Collard
- Pierre-Rose-Ursule-Dumoulin Borie
- Pierre-Sebastien Laurentie
- Pierre-Simon Laplace
- Pierre-Suzanne-Augustin Cochin
- Pietism
- Pietro Alagona
- Pietro Alfieri
- Pietro and Ambrogio Lorenzetti
- Pietro Bembo
- Pietro Berrettini
- Pietro Caperolo
- Pietro Castelli
- Pietro Colonna Galatino
- Pietro Delfino
- Pietro Della Valle
- Pietro Francesco Mazzuchelli
- Pietro Giannone
- Pietro Luigi Galletti
- Pietro Maria Gazzaniga
- Pietro Metastasio
- Pietro Pomponazzi
- Pietro Sforza Pallavicino
- Pilgrimage of Grace
- Pilgrimages
- Piligrim
- Pillar of Cloud (Pillar of Fire)
- Pima Indians
- Pinar Del Rio
- Pinara
- Pinerolo
- Pinturicchio
- Pious Associations
- Pious Workers of St. Joseph Calasanctius
- Pirkheimer
- Piro Indians
- Pisa
- Piscataway Indians
- Piscina
- Pisidia
- Pistoia and Prato
- Pittsburgh
- Pityus
- Pius Bonifacius Gams
- Pius Melia
- Pius Zingerle
- Piusverein
- Placide-Louis Chapelle
- Placidus Bocken
- Placidus Braun
- Placidus Fixlmillner
- Plagues of Egypt
- Plain Chant
- Plants in the Bible
- Plasencia
- Plato and Platonism
- Plegmund
- Plenarium
- Plenary Council
- Plenary Councils of Baltimore
- Plock
- Pluscarden Priory
- Plymouth
- Pneumatomachi
- Poggio Bracciolini
- Poggio Mirteto
- Pogla
- Poitiers
- Pol de Limbourg
- Poland
- Polemonium
- Poles in the U.S. (Table)
- Poles in the United States
- Policastro
- Polidoro (da Caravaggio) Caldara
- Polish Literature
- Politian
- Political Economy
- Polybotus
- Polycarpus
- Polydore Vergil
- Polyglot Bibles
- Polystylum
- Polytheism
- Pomaria
- Pomerania
- Pompeiopolis
- Pompeo Marchesi
- Pomponius Laetus
- Ponce de Leon
- Pondicherry
- Pontefract Priory
- Pontifical Audiences
- Pontifical Colleges
- Pontifical Decorations
- Pontifical Indult
- Pontifical Mass
- Pontificale
- Pontificalia
- Pontius Carbonell
- Pontius Pilate
- Pontus
- Pools in Scripture
- Poona
- Poor Brothers of St. Francis Seraphicus
- Poor Catholics
- Poor Clares
- Poor Handmaids of Jesus Christ
- Poor Laws
- Poor Servants of the Mother of God
- Popayan
- Pope Adrian I
- Pope Adrian II
- Pope Adrian IV
- Pope Adrian V
- Pope Adrian VI
- Pope Agapetus II
- Pope Alexander II
- Pope Alexander III
- Pope Alexander IV
- Pope Alexander VI
- Pope Alexander VII
- Pope Alexander VIII
- Pope Anastasius II
- Pope Anastasius III
- Pope Anastasius IV
- Pope Benedict I
- Pope Benedict III
- Pope Benedict IV
- Pope Benedict IX
- Pope Benedict V
- Pope Benedict VI
- Pope Benedict VII
- Pope Benedict VIII
- Pope Benedict X
- Pope Benedict XI
- Pope Benedict XIII
- Pope Benedict XIV
- Pope Bl. Urban II
- Pope Bl. Urban V
- Pope Blessed Eugene III
- Pope Blessed Victor III
- Pope Boniface II
- Pope Boniface IX
- Pope Boniface VIII
- Pope Callistus I
- Pope Callistus II
- Pope Callistus III
- Pope Celestine II
- Pope Celestine III
- Pope Celestine IV
- Pope Celestine V
- Pope Christopher
- Pope Clement II
- Pope Clement III
- Pope Clement IV
- Pope Clement IX
- Pope Clement V
- Pope Clement VI
- Pope Clement VII
- Pope Clement VIII
- Pope Clement X
- Pope Clement XI
- Pope Clement XII
- Pope Clement XIII
- Pope Conon
- Pope Constantine
- Pope Cornelius
- Pope Damasus II
- Pope Donus
- Pope Eugene II
- Pope Eugene IV
- Pope Felix IV
- Pope Formosus
- Pope Gelasius II
- Pope Gregory IV
- Pope Gregory IX
- Pope Gregory V
- Pope Gregory VI
- Pope Gregory VIII
- Pope Gregory X
- Pope Gregory XI
- Pope Gregory XII
- Pope Gregory XIII
- Pope Gregory XIV
- Pope Gregory XV
- Pope Gregory XVI
- Pope Honorius I
- Pope Honorius II
- Pope Honorius III
- Pope Honorius IV
- Pope Innocent I
- Pope Innocent II
- Pope Innocent III
- Pope Innocent IV
- Pope Innocent IX
- Pope Innocent V
- Pope Innocent VI
- Pope Innocent VII
- Pope Innocent VIII
- Pope Innocent X
- Pope Innocent XI
- Pope Innocent XII
- Pope Innocent XIII
- Pope Joan
- Pope John II
- Pope John III
- Pope John IV
- Pope John IX
- Pope John V
- Pope John VI
- Pope John VII
- Pope John VIII
- Pope John X
- Pope John XI
- Pope John XII
- Pope John XIII
- Pope John XIV
- Pope John XIX (XX)
- Pope John XV (XVI)
- Pope John XVII (XVIII)
- Pope John XVIII (XIX)
- Pope John XXI (XX)
- Pope John XXII
- Pope Julius II
- Pope Lando
- Pope Leo V
- Pope Leo VI
- Pope Leo X
- Pope Leo XI
- Pope Leo XII
- Pope Leo XIII
- Pope Liberius
- Pope Lucius II
- Pope Lucius III
- Pope Marcellus II
- Pope Marinus I
- Pope Marinus II
- Pope Martin IV
- Pope Martin V
- Pope Nicholas II
- Pope Nicholas III
- Pope Nicholas IV
- Pope Nicholas V
- Pope Paschal I
- Pope Paschal II
- Pope Paul I
- Pope Paul II
- Pope Paul III
- Pope Paul IV
- Pope Paul V
- Pope Pelagius I
- Pope Pius II
- Pope Pius III
- Pope Pius IV
- Pope Pius IX
- Pope Pius VI
- Pope Pius VII
- Pope Pius VIII
- Pope Pius X
- Pope Romanus
- Pope Sabinianus
- Pope Saint Eugene I
- Pope Saint Eutychianus
- Pope Saint Fabian
- Pope Saint Hilarus
- Pope Saint Julius I
- Pope Saint Leo II
- Pope Saint Leo IV
- Pope Saint Lucius I
- Pope Saint Martin I
- Pope Saint Nicholas I
- Pope Saint Symmachus
- Pope Sergius II
- Pope Sergius III
- Pope Sergius IV
- Pope Severinus
- Pope Sisinnius
- Pope Sixtus IV
- Pope Sixtus V
- Pope St. Adeodatus
- Pope St. Adrian III
- Pope St. Agapetus I
- Pope St. Agatho
- Pope St. Alexander I
- Pope St. Anacletus
- Pope St. Anastasius I
- Pope St. Anicetus
- Pope St. Anterus
- Pope St. Benedict II
- Pope St. Boniface I
- Pope St. Celestine I
- Pope St. Clement I
- Pope St. Cletus
- Pope St. Damasus I
- Pope St. Deusdedit
- Pope St. Dionysius
- Pope St. Eleutherius
- Pope St. Eusebius
- Pope St. Evaristus
- Pope St. Felix I
- Pope St. Felix III
- Pope St. Gelasius I
- Pope St. Gregory II
- Pope St. Gregory III
- Pope St. Gregory VII
- Pope St. Hormisdas
- Pope St. Hyginus
- Pope St. John I
- Pope St. Leo I (The Great)
- Pope St. Leo III
- Pope St. Linus
- Pope St. Marcellinus
- Pope St. Marcellus I
- Pope St. Mark
- Pope St. Miltiades
- Pope St. Pius I
- Pope St. Pius V
- Pope St. Pontian
- Pope St. Sergius I
- Pope St. Silverius
- Pope St. Simplicius
- Pope St. Siricius
- Pope St. Sixtus I
- Pope St. Sixtus II
- Pope St. Sixtus III
- Pope St. Stephen I
- Pope St. Telesphorus
- Pope St. Victor I
- Pope St. Vitalian
- Pope St. Zachary
- Pope St. Zephyrinus
- Pope St. Zosimus
- Pope Stephen (II) III
- Pope Stephen (III) IV
- Pope Stephen (IV) V
- Pope Stephen (IX) X
- Pope Stephen (V) VI
- Pope Stephen (VI) VII
- Pope Stephen (VII) VIII
- Pope Stephen (VIII) IX
- Pope Stephen II
- Pope Sylvester I
- Pope Sylvester II
- Pope Theodore I
- Pope Theodore II
- Pope Urban I
- Pope Urban III
- Pope Urban IV
- Pope Urban VI
- Pope Urban VII
- Pope Urban VIII
- Pope Valentine
- Pope Victor II
- Pope Vigilius
- Popular Devotions
- Porphyreon
- Port Alegre
- Port Augusta
- Port Louis
- Port of Spain
- Port Victoria
- Port-Au-Prince
- Port-Royal
- Portable Altar
- Portalegre
- Porter (Doorkeeper)
- Portiuncula
- Portland, Maine
- Porto Alegre
- Porto and Santa-Rufina
- Portoviejo
- Portraits of the Apostles
- Portsmouth
- Portugal
- Portugues East Africa
- Portuguese Literature
- Portuguese West Africa
- Positivism
- Post-Reformation Catholic Dukes of Norfolk
- Postcommunion
- Postulant
- Postulation
- Potawatomi Indians
- Poverty
- Poverty and Pauperism
- Power of the Keys
- Pozzuoli
- Praelatus Nullius
- Pragmatic Sanction
- Pragmatism
- Prague
- Praxeas
- Praxedes and Pudentia
- Prayer
- Prayer of Quiet
- Prayer-Books
- Prayers For the Dead
- Pre-1773 History of the Jesuits
- Pre-Columbian Discovery of America
- Preacher Apostolic
- Preadamites
- Prebend
- Precaria
- Precedence
- Precentor
- Precious Blood
- Precious Stones in the Bible
- Preconization
- Predestinarianism
- Predestination
- Preface
- Prefect Apostolic
- Prefecture Apostolic
- Prefecture Apostolic of Belgian Ubanghi
- Prefecture Apostolic of Misocco and Calanca
- Prefecture Apostolic of Southern Kan-Su
- Prefecture Apostolic of Sumatra
- Prefecture Apostolic of the Delta of the Nile
- Prefecture Apostolic of Welle
- Prelate
- Premonstratensian Canons
- Premontre
- Preparation for Death
- Presbyterianism
- Presbytery
- Prescription
- Prescription in Civil Jurisprudence
- Presence of God
- Presentation Brothers
- Prester John
- Presumption
- Presumption
- Preto Ribeirao
- Pretorium
- Pride
- Priene
- Priest
- Priesthood
- Priests' Communion League
- Priests' Eucharistic League
- Primacy
- Primate
- Prime
- Primicerius
- Prince Albert
- Prince Charles d'Aremberg
- Prince Henry the Navigator
- Prince von Metternich
- Principality and Diocese of Monaco
- Principality of Waldeck-Pyrmont
- Prior
- Prioress
- Priory
- Priory of Saint Andrews
- Priscianus
- Priscillianism
- Prisons
- Private Revelations
- Privilege
- Privilege of Competency
- Privileged Altar
- Probabilism
- Processional Cross
- Processions
- Proconnesus
- Procopius Divisch
- Procopius of Caesarea
- Procurator
- Promotor Fidei
- Promulgation
- Proof
- Property
- Prophecy
- Prophecy, Prophet, and Prophetess
- Proprium
- Prose or Sequence
- Proselyte
- Prosper Louis Pascal Gueranger
- Prospero Alpini
- Prospero Fagnani
- Protectorate of Missions
- Protectories
- Protestant Episcopal Church in the United States of America
- Protestantism
- Prothonotary Apostolic
- Protocol
- Protopope
- Proverbs
- Providence, Rhode Island
- Province of Quebec
- Provincial
- Provincial Council
- Provincial Councils of Baltimore
- Provost
- Prudence
- Prudentius
- Prudentius Maran
- Prum
- Prusias Ad Hypium
- Prussia
- Przemysl
- Przemysl, Sambor, and Sanok
- Psalms
- Psalms of Solomon
- Psalterium
- Psycho-Physical Parallelism
- Psychoanalysis
- Psychological Assimilation
- Psychology
- Psychology of Interest
- Psychotherapy
- Ptolemais
- Ptolemais
- Ptolemy the Gnostic
- Public Honesty (Decency)
- Publican
- Publius Aelius Hadrian
- Publius Lentulus
- Pueblo Indians
- Puerto Rico
- Pulati
- Pulpit
- Puno
- Purgatorial Societies
- Purgatory
- Purim
- Puritans
- Pusey and Puseyism
- Pustet
- Putative Marriage
- Puyallup Indians
- Pyrrhonism
- Pythagoras and Pythagoreanism
- Pyx
- St. Pachomius
- St. Pacificus of San Severino
- St. Pammachius
- St. Pantaleon
- St. Papias
- St. Pascal Baylon
- St. Paschasius
- St. Patrick
- St. Patrick's Purgatory
- St. Paul
- St. Paul of the Cross
- St. Paul the Simple
- St. Paul-Without-The-Walls
- St. Paula
- St. Paulinus II
- St. Paulinus of Nola
- St. Paulinus, Archbishop of York
- St. Perpetuus
- St. Peter Claver
- St. Peter Damian
- St. Peter Fourier
- St. Peter Gonzalez
- St. Peter Nolasco
- St. Peter of Alcantara
- St. Peter of Arbues
- St. Peter of Verona
- St. Peter, Prince of the Apostles
- St. Peter-Louis-Marie Chanel
- St. Petronius
- St. Philastrius
- St. Philip of Jesus
- St. Philip Romolo Neri
- St. Philip the Apostle
- St. Pionius
- St. Placidus
- St. Polycarp
- St. Poppo
- St. Porphyrius
- St. Possidius
- St. Prisca
- St. Proclus
- The Passion of Christ
- The Passion of Christ (Gospel Accounts)
- The Pious Fund of the Californias
- The Pious Society of Missions
- The Pope
- The Primer
- The Priory of Anglesea
- The Priory of Ardchattan
- The Pseudo-Hegesippus