S
- Saba and Sabeans
- Sabaoth
- Sabbatarians, Sabbatarianism
- Sabbath
- Sabbatical Year
- Sabbatine Privilege
- Sabrata
- Sacra Jam Splendent
- Sacra Romana Rota
- Sacrament of Marriage
- Sacramentals
- Sacraments
- Sacred Congregation of Propaganda
- Sacrifice
- Sacrifice of the Mass
- Sacrilege
- Sacris Solemniis
- Sacristan
- Sacristy
- Sadducees
- Sagalassus
- Sahaptin Indians
- Saint Albert
- Saint Alexis Falconieri
- Saint Amandus
- Saint Andrew the Scot
- Saint Andrews and Edinburgh
- Saint Bartholomew's Day Massacre
- Saint Cloud
- Saint Daniel and Companions
- Saint Engelbert of Cologne
- Saint Eucharius
- Saint Eugenius of Carthage
- Saint Eulogius of Alexandria
- Saint Euphrasia
- Saint Exuperius
- Saint Francis Mission
- Saint Fulgentius
- Saint Gall
- Saint Gall
- Saint Galla
- Saint George's
- Saint Germain, Bishop of Auxerre
- Saint Germain, Bishop of Paris
- Saint Gregory of Nyssa
- Saint Gudula
- Saint Helen of Skofde
- Saint Herbert of Derwentwater
- Saint Hermas
- Saint Hildegard
- Saint Honoratus
- Saint Hospitius
- Saint Hugh of Lincoln
- Saint Hyacinthe
- Saint John (Canada)
- Saint John Damascene
- Saint John Lateran
- Saint John of Beverley
- Saint John of Sahagun
- Saint John's University
- Saint Joseph Oriol
- Saint Joseph, Missouri
- Saint Julie Billiart
- Saint Kentigern
- Saint Lawrence Justinian
- Saint Leocadia
- Saint Leodegar
- Saint Leontius
- Saint Loman
- Saint Louis (Missouri)
- Saint Ludger
- Saint Macarius
- Saint Maedoc
- Saint Maelrubha
- Saint Magnus
- Saint Marcellina
- Saint Margaret of Scotland
- Saint Mark
- Saint Maruthas
- Saint Mary Magdalen De' Pazzi
- Saint Mary of Egypt
- Saint Maurus
- Saint Monica
- Saint Nicomedes
- Saint Ninian
- Saint Odo
- Saint Otto
- Saint Palladius
- Saint Paschasius Radbertus
- Saint Paul
- Saint Paul the Hermit
- Saint Peter Chrysologus
- Saint Peter of Sebaste
- Saint Peter Urseolus
- Saint Petersburg
- Saint Petronilla
- Saint Philomena
- Saint Pulcheria
- Saint Remigius
- Saint Symphorosa
- Saint Tatwin
- Saint Thais
- Saint Theobald
- Saint Theodard
- Saint Therese of Lisieux
- Saint Thomas
- Saint Thomas of Guiana
- Saint Thomas of Mylapur
- Saint Trumwin
- Saint Virgilius
- Saint-Brieuc
- Saint-Claude
- Saint-Denis
- Saint-Die
- Saint-Flour
- Saint-Jean-De-Maurienne
- Saint-Pierre and Miquelon
- Saint-Simon and Saint-Simonism
- Sainte Anne d'Auray
- Sainte Anne de Beaupre
- Saints Julian and Basilissa
- Saints Kieran
- Saints Romanus
- Saints Rufinus
- Saints Rufus
- Saints Vincent and Anastasius
- Salamanca
- Salamis
- Salazar Francisco Cervantes
- Sale
- Salem
- Salerno
- Salford
- Salimbene Degli Adami
- Salisbury
- Saliva Indians
- Salmanticenses and Complutenses
- Salmas
- Salmeron
- Salminius Hermias Sozomen
- Salome
- Salt
- Salt Lake
- Salta
- Saltillo
- Salto
- Saluzzo
- Salvation
- Salvator Tongiorgi
- Salvatore Rosa
- Salve Mundi Salutare
- Salve Regina
- Salvete Christi Vulnera
- Salvianus
- Salzburg
- Samar and Leyte
- Samaria
- Samaritan Language and Literature
- Samoa
- Samogitia
- Samos
- Samosata
- Sampson Erdeswicke
- Samson
- Samson
- Samuco Indians
- Samuel de Champlain
- Samuel Eccleston
- Samuel Fritz
- Samuel Webbe
- San Antonio
- San Carlos de Ancud
- San Francisco
- San Gallo
- San Jose de Costa Rica
- San Juan (Argentina)
- San Leon Del Amazonas
- San Luis Potosi
- San Marco and Bisignano
- San Marino
- San Martino Al Cimino
- San Miniato
- San Salvador
- San Salvador
- San Severino
- San Severo
- Sancho de Avila
- Sanctifying Grace
- Sanction
- Sanctity (Mark of the Church)
- Sanctorum Meritis
- Sanctuary
- Sanctuary
- Sanctus
- Sandemanians
- Sandhurst
- Sandomir
- Sandro Botticelli
- Sandwich Islands (Hawaii)
- Sanetch Indians
- Sanhedrin
- Sankt Poelten
- Sant' Angelo De' Lombardi
- Sant' Angelo in Vado and Urbania
- Santa Agata Dei Goti
- Santa Casa di Loreto (Holy House of Loreto)
- Santa Catharina
- Santa Cruz de la Sierra
- Santa Fe (Argentina)
- Santa Fe (New Mexico)
- Santa Lucia Del Mela
- Santa Maria (Brazil)
- Santa Maria de Monserrato
- Santa Marta (Colombia)
- Santa Severina
- Santander
- Santarem
- Santes Pagnino
- Santiago de Guatemala
- Santiago Del Estero
- Santo Domingo
- Sao Carlos Do Pinhal
- Sao Luiz de Ciceres
- Sao Luiz de Maranhao
- Sao Paulo (Brazil)
- Sao Salvador de Bahia de Todos Os Santos
- Sao Sebastiao Do Rio de Janeiro
- Sao Thiago de Cabo Verde
- Sappa
- Sara
- Sarabaites
- Saragossa
- Sarah Atkinson
- Sarah M. Brownson
- Sarah Peter
- Sarayacu Mission
- Sardes
- Sardica
- Sardinia
- Sarepta
- Sarsina
- Sarum Rite
- Sasima
- Saskatchewan and Alberta
- Sassari
- Satala
- Sauatra
- Saul
- Sault Sainte Marie
- Savannah
- Savaric
- Savary
- Savona and Noli
- Savoy
- Saxe-Altenburg
- Saxe-Coburg and Gotha
- Saxe-Meiningen
- Saxe-Weimar-Eisenach
- Saxo Grammaticus
- Saxony
- Scala Sancta (Holy Stairs)
- Scalimoli
- Scandal
- Scapular
- Scepticism
- Schaftlarn
- Schaumburg-Lippe
- Schenute
- Schism
- Schleswig
- Schola Cantorum
- Scholasticism
- Schonborn
- Schoningh
- School of Clonard
- School of Cork
- School of Derry
- School of Durrow
- School of Glendalough
- School of Iona
- School of Kells
- School of Kildare
- School of Lismore
- School of Mayo
- School of Ross
- School of Tuam
- School Sisters of Notre Dame
- Schools
- Schottenkloster
- Schwarzburg
- Schwenckfeldians
- Science and the Church
- Scillium (Titular See)
- Scipione Gonzaga
- Scopia
- Scotism and Scotists
- Scotland
- Scoto-Hibernian Monasteries
- Scranton
- Scribes
- Scriptorium
- Scriptural Glosses
- Scriptural Tropology
- Scripture
- Scruple
- Scrutiny
- Sculpture
- Scutari
- Scythopolis
- Sea of Galilee
- Seal
- Seattle
- Sebaste
- Sebastia
- Sebastian Brant
- Sebastian Brunner
- Sebastian Kneipp
- Sebastian Rale (Rasle)
- Sebastian Redford
- Sebastian von Rostock
- Sebastian Westcott
- Sebastiano de Herrera Barnuevo
- Sebastiano Del Piombo
- Sebastiao Barradas
- Sebastopolis
- Sebenico
- Sechelt Indians
- Seckau
- Second Council of Constantinople
- Second Council of Lyons
- Second Council of Nicaea
- Second Lateran Council
- Secret
- Secret Societies
- Sect and Sects
- Secular Clergy
- Secularism
- Secularization
- Sedia Gestatoria
- Sedilia
- Seduction
- Sedulius
- Sedulius Scotus
- See of Tinin (Dalmatia)
- Seekers
- Seerth
- Seez
- Segni
- Segorbe
- Segovia
- Sehna
- Seigneur and Marquis de Denonville
- Sejny
- Sekanais
- Seleucia Pieria
- Seleucia Trachea
- Seleucians
- Seleucids
- Self-Defense
- Selge
- Selinus
- Selymbria
- Sem (Shem)
- Semiarians and Semiarianism
- Semipelagianism
- Semites
- Semitic Epigraphy
- Senanque
- Seneca Indians
- Senegambia
- Sens
- Sentence
- Septimius Severus
- Septuagesima
- Septuagint Version
- Serafino Porrecta
- Serajevo (Sarajevo)
- Seraphim
- Sergiopolis
- Sergius and Bacchus
- Serrae
- Servants of Mary (Order of Servites)
- Servants of the Most Blessed Sacrament
- Servia (Serbia)
- Servus Servorum Dei
- Sessa-Aurunca
- Setebo Indians
- Seven Deacons
- Seven Robbers
- Seven-Branch Candlestick
- Severian
- Severin Binius
- Severus Sanctus Endelechus
- Seville
- Sexagesima
- Sext
- Sexton
- Shamanism
- Shammai
- Sherborne Abbey
- Sherbrooke
- Shi-Koku
- Shire
- Shrewsbury
- Shrine of Guadalupe
- Shrine of Oostacker
- Shrines in Great Britain and Ireland
- Shrovetide
- Shuswap Indians
- Siam (Thailand)
- Siberia
- Sibylline Oracles
- Sicard
- Sicca Veneria
- Sichem
- Sicilian Vespers
- Sicily
- Sidon
- Sidon
- Sidonius
- Sidron de Hossche
- Sidyma
- Siena
- Sierra Leone
- Sieur de Laverendrye
- Sigebert of Gembloux
- Siger of Brabant
- Sigismond Thalberg
- Sigismund
- Sigismund Albicus
- Sigismund Krasinski
- Sign of the Cross
- Siguenza
- Sikhism
- Silandus
- Silence
- Silesia
- Silesius Angelus
- Siletz Indians
- Siloe
- Silveira
- Silvester Jenks
- Silvio Antoniano
- Silvio Pellico
- Simeon
- Simeon of Durham
- Simla
- Simon de Montfort
- Simon Islip
- Simon Langham
- Simon Le Moyne
- Simon Magus
- Simon of Cramaud
- Simon of Cremona
- Simon of Sudbury
- Simon of Tournai
- Simon Starowolski
- Simon Stevin
- Simon Szymonowicz
- Simon Tunsted
- Simon Vigor
- Simon William Gabriel Brute de Remur
- Simone Da Orsenigo
- Simone de Magistris
- Simone Martini
- Simonians
- Simony
- Simplicius, Faustinus, and Beatrice
- Sin
- Sinai
- Sinaloa
- Sinigaglia
- Sinis
- Sinope
- Sion
- Sion
- Sioux City
- Sioux Falls
- Sioux Indians
- Sipibo Indians
- Sir Ambrose Shea
- Sir Anthony Fitzherbert
- Sir Caryll Molyneux
- Sir Charles Gavan Duffy
- Sir Dominic Corrigan
- Sir Everard Digby
- Sir George Bowyer
- Sir Henry Bedingfield
- Sir Henry Charles Englefield
- Sir Henry Hawkins
- Sir John Charles Day
- Sir John Thomas Gilbert
- Sir Kenelm Digby
- Sir Patrick Alfred Jennings
- Sir Patrick Alphonsus Buckley
- Sir Richard Bellings
- Sir Richard Bulstrode
- Sir Richard Sutton
- Sir Thomas Malory
- Sir Thomas Metham
- Sir Thomas Tresham
- Sir Tobie Matthew
- Sir William d'Avenant
- Sir William Hales Hingston
- Sirmium
- Sister Irene (Catherine Fitzgibbon)
- Sister Louise
- Sisters Marianites of Holy Cross
- Sisters of Charity (St. John, New Brunswick)
- Sisters of Charity of Cincinnati
- Sisters of Charity of Jesus and Mary
- Sisters of Charity of Nazareth
- Sisters of Charity of Our Lady Mother of Mercy
- Sisters of Charity of Providence
- Sisters of Charity of Providence
- Sisters of Charity of St. Elizabeth
- Sisters of Charity of St. Louis
- Sisters of Charity of St. Paul
- Sisters of Charity of St. Vincent de Paul
- Sisters of Charity of St. Vincent de Paul (New York)
- Sisters of Charity of the Blessed Virgin Mary
- Sisters of Charity of the Incarnate Word
- Sisters of Christian Charity
- Sisters of Divine Providence
- Sisters of Mercy
- Sisters of Mercy of St. Borromeo
- Sisters of Notre Dame (Cleveland, Ohio)
- Sisters of Our Lady of Charity of the Refuge
- Sisters of Our Lady of Perpetual Help
- Sisters of Providence
- Sisters of Saint Joseph
- Sisters of Sainte Anne of Providence
- Sisters of St. Elizabeth
- Sisters of the Assumption
- Sisters of the Good Samaritan
- Sisters of the Holy Childhood of Jesus and Mary
- Sisters of the Holy Cross
- Sisters of the Holy Faith
- Sisters of the Holy Humility of Mary
- Sisters of the Holy Names of Jesus and Mary
- Sisters of the Institute of Charity of Providence
- Sisters of the Little Company of Mary
- Sisters of the Perpetual Adoration
- Sisters of the Poor Child Jesus
- Sisters of the Poor of St. Francis
- Sisters of the Temple
- Sistine Choir
- Sitifis
- Siunia
- Slander
- Slavery and Christianity
- Slaves (Dene Indians)
- Slavonic Language and Liturgy
- Sloth
- Smalkaldic League
- Smyrna
- Snorri Sturluson
- Sobaipura Indians
- Socialism
- Socialistic Communities
- Society
- Society
- Society For Promoting Christian Knowledge
- Society for the Propagation of the Faith
- Society of Divine Charity
- Society of Foreign Missions of Paris
- Society of Friends (Quakers)
- Society of Mary (Marist Fathers)
- Society of Mary of Paris
- Society of Saint Vincent de Paul
- Society of Saint-Sulpice
- Society of St. Charles Borromeo
- Society of the Divine Savior
- Society of the Divine Word
- Society of the Helpers of the Holy Souls
- Society of the Holy Child Jesus
- Society of the Holy Name
- Society of the Sacred Heart of Jesus (Paccanarists)
- Society of the Sisters of St. Ursula of the Blessed Virgin
- Socinianism
- Sociology
- Socorro
- Socrates
- Socrates
- Sodality
- Sodom and Gomorrha
- Sodoma
- Soissons
- Solari
- Solemnity
- Soli
- Solicitation
- Solimoes Superiore
- Solomon
- Solomon Islands (Northern)
- Solsona
- Somaliland
- Somaschi
- Son of God
- Son of Man
- Songish Indians
- Sonora
- Sophene
- Sophie Rostopchine, Comtesse de Segur
- Sophie-Jeanne Soymonof Swetchine
- Sophists
- Sophonias (Zephaniah)
- Sophronius
- Sora
- Sorbonne
- Sorrento
- Soul
- South Carolina
- South Dakota
- Southern Kiang-Si
- Southern Solomon Islands
- Southern Victoria Nyanza
- Southwark
- Sovana and Pitigliano
- Sozopolis
- Sozusa
- Space
- Spain
- Spalato-Macarsca
- Spanish Language and Literature
- Spanish-American Literature
- Spanish-American Universities
- Sparta
- Special Devotions For Months
- Species
- Speculation
- Speyer
- Spinoza
- Spire
- Spirit
- Spiritism
- Spirito Santo
- Spiritual Direction
- Spiritual Exercises of Saint Ignatius
- Spiritualism
- Spirituals
- Spokan Indians
- Spoleto
- Springfield
- Squamish Indians
- Squillace
- ST. IVO (YVES) OF CHARTRES
- St. Sabbas
- St. Sabina
- St. Samson
- St. Saturninus
- St. Sebastian
- St. Sechnall (Secundinus)
- St. Senan
- St. Seraphin of Montegranaro
- St. Serapion
- St. Sexburga
- St. Silvia
- St. Simeon Stylites the Elder
- St. Simeon Stylites the Younger
- St. Simon Stock
- St. Simon the Apostle
- St. Stanislas Kostka
- St. Stanislaus of Cracow
- St. Stephen
- St. Stephen
- St. Stephen Harding
- St. Stephen of Muret
- St. Suitbert
- St. Swithin
- St. Sylvester Gozzolini
- Stabat Mater
- Stained Glass
- Stalls
- Stanbrook Abbey
- Stanislaus and John Kozmian
- Stanislaus du Lac
- Stanislaus Hosius
- Stanislaus Konarski
- Stanislaus Zolkiewski
- Stanislaw Karnkowski
- Stanislawow
- Stanley Falls
- Stanza
- State and Church
- State of New York
- State of Washington
- State Or Way (Purgative, Illuminative, Unitive)
- States of the Church
- Station Days
- Statistics of Religions
- Statute of Provisors
- Stauropolis
- Stedingers
- Stefano Antonio Morcelli
- Stefano Borgia
- Stefano Infessura
- Stefano Maderno
- Steinamanger
- Stephan Jakob Neher
- Stephan Ladislaus Endlicher
- Stephan Szanto
- Stephan Wiest
- Stephen Brinkley
- Stephen Doutreleau
- Stephen Goffe
- Stephen Hawes
- Stephen Joseph Perry
- Stephen Lochner
- Stephen Mallory White
- Stephen Moylan
- Stephen of Autun
- Stephen of Bourbon
- Stephen of Tournai
- Stephen Rowsham
- Stephen Russell Mallory
- Stephen Theodore Badin
- Stephen White
- Stipend
- Stockholm
- Stoics and Stoic Philosophy
- Stolberg
- Stole
- Stoning in Scripture
- Stonyhurst College
- Strasburg
- Stratonicea
- Striking of the Breast
- Stripping of an Altar
- Sts. Abdon and Sennan
- Sts. Chrysanthus and Daria
- Sts. Cosmas and Damian
- Sts. Crispin and Crispinian
- Sts. Cronan
- Sts. Cyprian and Justina
- Sts. Cyril and Methodius
- Sts. Cyrus and John
- Sts. Eoghan
- Sts. Eustachius and Companions
- Sts. Faith, Hope and Charity
- Sts. Faustinus and Jovita
- Sts. Felicitas and Perpetua
- Sts. Felix and Adauctus
- Sts. Fergus
- Sts. Fintan
- Sts. Gallicanus
- Sts. Gervasius and Protasius
- Sts. Gordianus and Epimachus
- Sts. Hippolytus
- Sts. John and Paul
- Sts. Maris, Martha, Audifax, and Abachum
- Sts. Mark and Marcellian
- Sts. Nabor and Felix
- Sts. Nazarius and Celsus
- Sts. Nereus and Achilleus, Domitilla and Pancratius
- Sts. Peter Baptist and Twenty-Five Companions
- Sts. Primus and Felician
- Sts. Processus and Martinian
- Sts. Protus and Hyacinth
- Sts. Quinctianus
- Sts. Quiricus and Julitta
- Sts. Quirinus
- Sts. Rufina
- Sts. Tarachus, Probus, and Andronicus
- Sts. Thecla
- Sts. Theodorus and Theophanes
- Sts. Tiburtius and Susanna
- Sts. Timotheus and Symphorian
- Sts. Trasilla and Emiliana
- Sts. Vitalis and Agricola
- Sts. Vitus, Modestus, and Crescentia
- Sts. Wigand
- Sts. Willibald and Winnebald
- Studion
- Stuhlweissenburg
- Stylites
- Styria
- Subdeacon
- Subiaco
- Subreption
- Substance
- Suburbicarian Dioceses
- Sudan
- Sufetula
- Suger
- Suicide
- Suidas
- Suitbert Baeumer
- Sulpicians in the United States
- Sulpicius Severus
- Sulpitius
- Summae
- Sunday
- Superior, Wisconsin
- Supernatural Adoption
- Supernatural Gift
- Supernatural Order
- Superstition
- Suppression of English Monasteries Under Henry VIII
- Suppression of Monasteries in Europe
- Supremi Disciplinae
- Sura
- Surnames of Famous Doctors
- Surplice
- Susa
- Susa
- Suspension (In Canon Law)
- Sweden
- Swedenborgians
- Swinomish Indians
- Switzerland
- Sydney
- Sydney Hodgson
- Syene
- Syllabus
- Sylvester Joseph Hunter
- Sylvester Maurus
- Sylvester Mazzolini
- Sylvester Norris
- Sylvestrines
- Symbolism
- Symbolism of the Fish
- Symeon Metaphrastes
- Symmachus the Ebionite
- Synagogue
- Synaus
- Synaxarion
- Synaxis
- Syncelli
- Syncretism
- Synderesis
- Syndicalism
- Synesius of Cyrene
- Synnada
- Synod
- Synod of Baccanceld
- Synod of Pistoia
- Synod of Whitby
- Synodal Examiners
- Synods of Augsburg
- Synods of Reims
- Synods of Rouen
- Synoptics
- Syntagma Canonum
- Syon Monastery
- Syra
- Syracuse
- Syracuse (New York)
- Syria
- Syriac Hymnody
- Syriac Language and Literature
- System of Leibniz
- Szatmar
- Sze-Ch'wan (Eastern)
- Sze-Ch'wan (North-Western)
- Sze-Ch'wan (Southern)
- The Sacrament of Penance
- The Salesian Society
- The School of Armagh
- The Scots College
- The Seal of Confession
- The Seven Liberal Arts
- The Seven Sleepers of Ephesus
- The Shroud of Turin
- The Slavs
- The Slavs in America
- The Social Contract
- The Society of the Blessed Sacrament
- The Society of the Sacred Heart of Jesus
- The South American College in Rome
- The Spanish Armada
- The Spanish Bull-Fight
- The Stradivari Family
- The Suppression of the Jesuits (1770-1773)
- The Synods of Arles