Pacandus
Pacca, Bartolommeo 
Pachomius, Saint
Pacificus 
Pacificus of Ceredano, Blessed
Pacioli, Lucas 
Paderborn
Padilla, Juan de
Padua
Padua, University of
Paganism
Pagano, Mario 
Page, Anthony, Ven. 
Pagi, Antoine 
Pagi, François 
Painting, Religious
Palæontology
Palasor, Thomas Ven.
Palatinate, Rhenish
Palawan
Paleotti, Gabriele 
Palestrina, Giovanni Pierluigi da 
Paley, Frederick Apthorp
Pall
Palladio, Andrea
Pallium
Palm in Christian Symbolism
Palm Sunday
Palmieri, Luigi
Pamelius -- Belgian theologian
Pammachius, Saint
Pamphilus of Cæsarea, Saint
Panemotichus 
Pange Lingua Gloriosi
Panpsychism
Pantaleon, Saint
Pantheism
Panvinio, Onofrio
Paoli, Angelo Ven.
Papacy, The
Papal Elections
Papias, Saint
Parables
Paracelsus, Theophrastus
Paraclete
Paralipomenon (Chronicles)
Parallelism
Paralus
Parasceve
Paray-le-Monial
Pardies, Ignace-Gaston
Paré, Ambroise
Pareja, Francisco
Parenzo-Pola
Parini, Giuseppe
Paris, Alexis-Paulin
Paris, Matthew
Parish
Parium
Parlatore, Filippo
Parochial Mass
Parsis
Pascal, Blaise  
Pascal Baylon, Saint
Paschal I, Pope Saint  (See Chronological Lists of Popes)
Paschal II, Pope  (See Chronological Lists of Popes)

Paschal Candle
Paschal Tide
Paschasius, Saint
Passion Music
Passion of Christ, Commemoration
Passion of Jesus Christ
Passion of Jesus Christ in Gospels
Passion Plays
Passions
Passion Sunday
Passiontide
Pasteur, Louis
Pasto, Diocese of
Pastor
Patara
Paten
Patenson, William Ven.
Pathology, Mental
Patmos
Patriarch
Patrick, Saint
Patrology
Patronage of Our Lady, Feast o
Paul I, Pope Saint  (See Chronological Lists of Popes)
Paul II, Pope  (See Chronological Lists of Popes)
Paul III, Pope  (See Chronological Lists of Popes)
Paul IV, Pope  (See Chronological Lists of Popes)
Paul V, Pope  (See Chronological Lists of Popes)
Paul VI, Pope  (See Chronological Lists of Popes)

Paul of the Cross, Saint
Paul the Deacon
Paul the Hermit, Saint
Paul the Simple, Saint
Paula, Saint
Paulinus, Saint
Paulinus, Saint
Paulinus II, Saint
Paulinus a S. Bartholomaeo
Paulinus of Pella
Paulus Venetus
Pavillon, Nicolas
Pax
Pax in the Liturgy
Payeras, Mariano  
Peace of the Church
Pectorale
Pectorius of Autun
Pednelissus
Pedro de Cordova
Pelagia
Pelagius I, Pope  (See Chronological Lists of Popes)
Pelagius II, Pope  (See Chronological Lists of Popes)

Pelagius and Pelagianism
Pelargus, Ambrose
Pelisson-Fontanier, Paul
Pelletier, Pierre-Joseph
Pelouze, Théophile-Jules
Penal Laws
Peñalver y Cardenas, Luis Ignatius
Penance (a Virtue)
Penance, Sacrament of
Pendleton, Henry
Penelakut Indians
Penitentes, Los Hermanos
Penitential Canons
Penitential Orders
Penitents, Confraternities of
Penne and Atri, Diocese of
Pennsylvania
Penobscot Indians
Pentacomia
Pentateuch
Pentecost
Peoria
Peoria Indians
Pepin the Short
Percy, John
Peregrinus
Pereira, Benedict
Pérez de Hita, Ginés
Perfection, Christian and Religious
Perge
Pergolesi, Giovanni Battista
Pericui Indians
Periodi
Perjury
Permaneder, Franz Michael
Pernter, Joseph Maria
Perpetual Succour, Our Lady
Perpetuus, Saint
Perpignan, Diocese of
Perpignan, University of
Perraud, Adolphe
Perrault, Charles
Perrault, Claude
Persecution
Persecutions, Coptic
Perseverance, Final
Person
Person, Ecclesiastical
Persons, Robert
Pertinax, Publius Helvius
Peru
Pescia
Pessimism
Pessinus
Pestalozzi and Pestalozzianism
Peter, Saint
Peter, Saint, Epistles of
Peter Baptist, Saint, and Martyr Companions
Peter Canisius, Blessed
Peter Cantor
Peter Cellensis
Peter Claver, Saint
Peter Comestor
Peter Damian, Saint
Peter Faber, Saint
Peter Fullo
Peter Gonzalez, Saint
Peter Lombard
Peter-Louis-Marie Chanel, Saint
Peter Mongus
Peter Nolasco, Saint
Peter of Alexandria, Saint
Peter of Aquila
Peterspence
Peter the Hermit
Peter Urseolus, Saint
Petitions to the Holy See
Petra
Petre, Family of
Petrobrusians
Petropolis
Petrus Diaconus
Peuerbach, George von
Peyto, William
Pfefferkorn, Johannes
Pharbætus
Pharisees
Phaselis
Phasga
Philastrius, Saint
Philemon
Philip the Apostle, Saint
Philip II
Philip of Jesus, Saint
Philip Romolo Neri, Saint
Philippi
Philippopolis
Philips, Peter
Philistines
Phillip, Robert
Philo Judæus
Philomena, Saint
Philosophy
Philoxenus
Phœnicia
Photinus
Phylacteries
Physics, History of
Pianciani, Giambattista
Piatus of Mons
Piazzi, Giuseppe
Picard, Jean
Piccolomini, Alessandro
Pickering, Thomas Ven.
Picquet, François  
Pie, Louis-Edouard-Désiré
Pie Pelicane, Jesu, Domine
Piedmont
Piel, Peter
Pierron, Jean
Pierson, Philippe
Pietism
Pighius, Albert
Pignatelli, Venerable Giuseppe Maria
Pilar, Nuestra Señora del
Pilate, Pontius
Pilchard, Venerable Thomas
Pilgrimage of Grace
Pilgrimages
Pillar of Cloud/Fire
Pingré, Alexandre Guy
Pinzón, Martín Alonso
Pionius, Saint
Pious Society of Missions
Piranesi, Giambattista
Pisa, Council of
Piscataway Indians
Pius I, Pope Saint 
(See Chronological Lists of Popes)
Pius II, Pope  (See Chronological Lists of Popes)
Pius III, Pope  (See Chronological Lists of Popes)
Pius IV, Pope  (See Chronological Lists of Popes)
Pius V, Pope Saint  (See Chronological Lists of Popes)
Pius VI, Pope  (See Chronological Lists of Popes)
Pius VII, Pope   (See Chronological Lists of Popes)
Pius VIII, Pope  (See Chronological Lists of Popes)
Pius IX, Pope  (See Chronological Lists of Popes)
Pius X, Pope Saint  (See Chronological Lists of Popes)
Pius XI, Pope  (See Chronological Lists of Popes)
Pius XII, Pope  (See Chronological Lists of Popes)

Pizarro, Francisco
Placidus, Saint
Plagues of Egypt
Plain Chant
Plantaganet, Henry Beaufort
Plateau, Joseph-Antoine 
Platina, Bartolomeo
Plato and Platonism
Plegmund
Plenarium
Plenary Council
Plowden, Charles
Plowden, Edmund
Plowden, Robert
Plowden, Thomas
Plunket, Blessed Oliver
Pluscarden Priory
Pole, Reginald
Poleni, Giovanni
Poles in the United States
Polo, Marco
Polycarp, Saint
Polyglot Bibles
Polytheism
Pombal, Marquis de
Ponce de León, Juan
Pontain, Pope Saint  (See Chronological Lists of Popes)
Pontian, Pope Saint  (See Chronological Lists of Popes)

Pontifical Colleges
Pontifical Mass
Pontificale
Pontigny, Abbey of
Poor, Little Sisters of the
Poor Brothers of St. Francis Seraphicus
Poor Catholics
Poor Clares
Poor Servants of the Mother of God
Popes, Chronological Lists of the
Popes, Election of the
Pope, Alexander  (See Chronological Lists of Popes)
Population, Theories of
Pormort, Ven. Thomas
Port Victoria
Portland
Port-Royal
Portuguese East Africa
Portuguese West Africa
Possession, Demonical
Possidius, Saint
Postcommunion
Postulant
Pouget, Jean-François-Albert
Poverty
Poverty and Pauperism
Praelatus Nullius
Pragmatic Sanction
Pragmatism
Prague
Prague, University of
Praxeas
Praxedes and Pudentiana
Prayer
Prayer-Books
Prayer of Christ, Feast of
Preacher Apostolic
Preachers, Order
Preadamites
Prebend
Precaria
Precedence
Precentor
Precept
Precious Blood
Precious Blood, Archconfraternity
Precious Blood, Congregations of
Preconization
Predestinarianism
Preface
Prefecture Apostolic
Prémare, Joseph Henri Marie de
Premonstratensian Canons
Prémontré, Abbey of
Presbyterianism
Presbytery
Presence of God
Pride
Priene
Priest
Priest, The High
Priesthood
Priests' Communion League
Primate
Prime
Primer, The
Primicerius
Primus and Felician, Saints
Prior
Prioress
Priory
Prisca, Saint
Priscianus
Priscillianism
Prisons
Prisons, Ecclesiastical
Privilege
Privileges, Ecclesiastical
Probabilism
Probus, Tarachus, and Andronicus, Saints
Processional, Roman
Processional Cross
Processions
Processus and Martinian, Saints
Proclus, Saint
Procopius of Caesarea
Procter, Adelaide Anne
Procurator
Profession, Religious
Promise, Divine
Promotor Fidei
Promulgation
Property Ecclesiastical
Prophecy
Prophecy, Prophet, and Prophetess
Proprium
Prose or Sequence
Proselyte
Prosper of Aquitaine, Tiro
Protestant Episcopal Church
Protestantism
Prothonotary Apostolic
Protocol
Protopope
Protus and Hyacinth, Saints
Provancher, Léon Abel
Providence, Divine
Province, Ecclesiastical
Provost
Prudence
Psalms, Alphabetic
Psalterium
Ptolemais
Ptolemy the Gnostic
Publican
Pulati
Pullus, Robert
Purgatory
Purgatory, St. Patrick's
Purim
Putative Marriage
Pythagoras and Pythagoreanism