Martyred by Diocletian
- 20,000 Martyrs of Nicomedia
- Four Crowned Martyrs
- Guardians of the Holy Scriptures
- Innumerable Martyrs of Saragossa
- Many Martyrs Who Suffered in Rome
- Martyred Soldiers of Rome
- Martyrs of Aegea
- Martyrs of Agde
- Martyrs of Albitina
- Martyrs of Alexandria
- Martyrs of Alexandria
- Martyrs of Amisus
- Martyrs of Ancyra
- Martyrs of Ancyra
- Martyrs of Antioch
- Martyrs of Aquileia
- Martyrs of Asta
- Martyrs of Augsburg
- Martyrs of Caesarea
- Martyrs of Caesarea
- Martyrs of Caesarea
- Martyrs of Campania
- Martyrs of Campania
- Martyrs of Cappadocia
- Martyrs of Chalcedon
- Martyrs of Cologne
- Martyrs of Heraclea
- Martyrs of Lichfield
- Martyrs of Nicomedia
- Martyrs of Nicomedia
- Martyrs of Nicomedia
- Martyrs of Nicomedia
- Martyrs of Nicomedia
- Martyrs of Nicomedia
- Martyrs of Nicomedia
- Martyrs of Nicomedia
- Martyrs of Novellara
- Martyrs of Nyon
- Martyrs of Piacenza
- Martyrs of Plovdiv
- Martyrs of Porto Romano
- Martyrs of Ravenna
- Martyrs of Rome
- Martyrs of Rome
- Martyrs of Rome
- Martyrs of Rome
- Martyrs of Rome
- Martyrs of Rome
- Martyrs of Saragossa
- Martyrs of Sebaste
- Martyrs of Sicily
- Martyrs of Syrmium
- Martyrs of Tarsus
- Martyrs of Tebourba
- Martyrs of Thagura
- Martyrs of the Baths
- Martyrs of the Salarian Way
- Martyrs of Tomi
- Martyrs of Trier
- Martyrs of Upper Egypt
- Martyrs of Venafro
- Martyrs of Via Lavicana
- Pope Saint Marcellinus
- Saint Aaron of Caerleon
- Saint Aaron of Pais-de-Laon
- Saint Abdon
- Saint Abudemius
- Saint Abudemius of Bozcaada
- Saint Abundantia the Martyr
- Saint Abundantius of Rome
- Saint Abundius
- Saint Acacius of Byzantium
- Saint Acacius of Sebaste
- Saint Aceolus of Amiens
- Saint Acisclus
- Saint Acius of Amiens
- Saint Actinea of Volterra
- Saint Acutius of Pozzuoli
- Saint Adaucus of Phrygia
- Saint Adautto of Carthage
- Saint Adrian of Nicomedia
- Saint Aemilian of Trebi
- Saint Afra of Augsburg
- Saint Agape of Thessalonica
- Saint Agapes of Nicomedia
- Saint Agapius of Caesarea
- Saint Agapius of Caesarea
- Saint Agapius of Edessa
- Saint Agathonicus of Constantinople
- Saint Agricola of Bologna
- Saint Alban of Britain
- Saint Alberta of Agen
- Saint Alberta of Agen
- Saint Albian of Albee
- Saint Alexander of Caesarea
- Saint Alexander of Nicomedia
- Saint Alexander of Perga
- Saint Alexander of Rome
- Saint Alexander of Thessalonica
- Saint Alexander of Trier
- Saint Alexander the Charcoal Burner
- Saint Alexandra of Amisus
- Saint Alexandria of Ancyra
- Saint Alphaeus of Palestine
- Saint Ambicus of Nicomedia
- Saint Ambrose of Ferentino
- Saint Ammon of Alexandria
- Saint Ampelius of Africa
- Saint Ampelus of Messina
- Saint Amphibalus of Verulam
- Saint Ananias of Phoenicia
- Saint Anastasia of Sirmium
- Saint Anastasius of Antioch
- Saint Anastasius of Lérida
- Saint Anastasius of Nicomedia
- Saint Anastasius the Fuller
- Saint Andronicus
- Saint Andronicus of Ephesus
- Saint Anectus of Caesarea
- Saint Anicetus of Marmora
- Saint Ansanus the Baptizer
- Saint Anthes of Salerno
- Saint Anthimos of Nicomedia
- Saint Anthimus of Aegea
- Saint Anthony of Antioch
- Saint Antonia of Constantinople
- Saint Antonina of Nicaea
- Saint Antoninus of Caesarea
- Saint Antoninus of Campania
- Saint Antoninus of Rome
- Saint Anysia of Salonika
- Saint Apodemus of Saragossa
- Saint Apollo of Nicomedia
- Saint Apollo of Novellara
- Saint Apollonius of Antinoë
- Saint Apollonius the Priest
- Saint Apronian the Executioner
- Saint Aquila of Trebizond
- Saint Aquilina of Syria
- Saint Aquilinus of Noyon
- Saint Ariston of Campania
- Saint Arnosus of Campania
- Saint Artemon of Laodicia
- Saint Asclas of Antinoe
- Saint Asteria of Bergamo
- Saint Athenodorus of Mesopotamia
- Saint Athenogenes of Sebaste
- Saint Attius of Perga
- Saint Audactus of Thibiuca
- Saint Augustine of Nicomedia
- Saint Augustus of Nicomedia
- Saint Autonomus
- Saint Auxentius of Sebaste
- Saint Azas of Isauria
- Saint Barlaam of Antioch
- Saint Barulas
- Saint Basilia
- Saint Basilides of Rome
- Saint Basilides the Senator
- Saint Basilissa of Nicomedia
- Saint Bassa of Edessa
- Saint Bassus of Sabina
- Saint Bassus the Senator
- Saint Basura of Masil
- Saint Beatrice of Rome
- Saint Benedict of Cupra
- Saint Benignus of Todi
- Saint Berenice
- Saint Boniface of Cilicia
- Saint Bono of Novellara
- Saint Caecilian of Saragossa
- Saint Caius of Nicomedia
- Saint Caius of Saragossa
- Saint Calamanda of Calaf
- Saint Caldia of Amisus
- Saint Calliopius of Pompeiopolis
- Saint Callistratus of Constantinople
- Saint Camerinus of Sardinia
- Saint Candidus of Trebizond
- Saint Cantian of Aquileia
- Saint Cantianilla of Aquileia
- Saint Cantius of Aquileia
- Saint Capicus of Campania
- Saint Capitolina
- Saint Caprasius of Agen
- Saint Carponius of Caesarea
- Saint Carpophorus
- Saint Carpophorus
- Saint Carterius of Caesarea
- Saint Cassiano of Novellara
- Saint Castoro of Novellara
- Saint Castorus
- Saint Castulus of Rome
- Saint Catulinus of Carthage
- Saint Celestine of Alexandria
- Saint Celsus of Antioch
- Saint Charitina of Amasa
- Saint Chariton
- Saint Chionia of Thessalonica
- Saint Christina of Bolsena
- Saint Chrysogonus
- Saint Cindeus
- Saint Cisellus of Sardinia
- Saint Claudia of Ancyra
- Saint Claudius of Léon
- Saint Claudius of Rome
- Saint Claudius of Rome
- Saint Clement of Ancyra
- Saint Clement of Cordoba
- Saint Concordius of Nicomedia
- Saint Constantius of Trier
- Saint Cosmas
- Saint Crementius of Saragossa
- Saint Crescentian of Campania
- Saint Crescentinus
- Saint Crescentius of Rome
- Saint Crescentius of Trier
- Saint Crispin of Thagura
- Saint Crispina
- Saint Crotates of Nicomedia
- Saint Cugat del Valles
- Saint Cutias of Rome
- Saint Cutonius of Campania
- Saint Cyprian of Antioch
- Saint Cyprille of Libya
- Saint Cyriacus of Iconium
- Saint Cyriacus of Málaga
- Saint Cyriacus of Nicomedia
- Saint Cyriacus the Martyr
- Saint Cyrinus of Rome
- Saint Cyrinus of Rome
- Saint Cyrinus of Rome
- Saint Dada of Durostorum
- Saint Dadas of Dorostorum
- Saint Damian
- Saint Damiano of Novellara
- Saint Daria of Venafro
- Saint Dasius of Dorostorum
- Saint Dasius of Nicomedia
- Saint Derphuta of Amisus
- Saint Desiderius of Pozzuoli
- Saint Didymus of Alexandria
- Saint Digna of Augsburg
- Saint Dio of Alexandria
- Saint Diocletius of Osimo
- Saint Diodoro of Aphrodisias
- Saint Diodorus of Campania
- Saint Diodorus the Deacon
- Saint Diomedes of Tarsus
- Saint Dion of Campania
- Saint Dionisio of Novellara
- Saint Dionysius of Asia
- Saint Dionysius of Augsburg
- Saint Dionysius of Caesarea
- Saint Dominica of Campania
- Saint Domna of Nicomedia
- Saint Domna of Nicomedia
- Saint Domnina
- Saint Domninus of Thessalonica
- Saint Domnio of Bergamo
- Saint Domnio of Salona
- Saint Donatian of Nantes
- Saint Donatilla of Tebourba
- Saint Donatus the Martyr
- Saint Doroteo of Nicomedia
- Saint Dorotheus of Nicomedia
- Saint Duje
- Saint Edistius of Ravenna
- Saint Egdunus
- Saint Eleutherius of Nicomedia
- Saint Elias of Phunon
- Saint Emidius of Ascoli Piceno
- Saint Emmanuel
- Saint Ennatha of Caesarea
- Saint Ephysius of Sardinia
- Saint Epicharis
- Saint Epigmenius of Rome
- Saint Erasmus
- Saint Erotheides
- Saint Esmaragdus of Nicomedia
- Saint Etherius of Nicomedia
- Saint Eucarpius of Nicomedia
- Saint Eudoxia of Canope
- Saint Eufrasia of Nicomedia
- Saint Eugene of Nicomedia
- Saint Eugene of Sebaste
- Saint Eugenius of Trebizond
- Saint Eulalia of Barcelona
- Saint Eulalia of Merida
- Saint Eunomia of Augsburg
- Saint Euphemia of Amisus
- Saint Euphrasia of Amisus
- Saint Euphrasia of Ancyra
- Saint Euplus of Catania
- Saint Euprepia of Augsburg
- Saint Euprepius of Aegea
- Saint Eusebius of Heraclea
- Saint Eusebius of Lydda
- Saint Eusebius the Senator
- Saint Eustochius of Ancyra
- Saint Eustorgius of Nicomedia
- Saint Eustratius of Sebaste
- Saint Euthymius of Nicomedia
- Saint Eutropia of Palmyra
- Saint Eutyches the Senator
- Saint Eutychian of Campania
- Saint Eutychius of Asta
- Saint Eutychius of Mauretania
- Saint Eutychius of Pozzuoli
- Saint Eutychius of Rome
- Saint Evaristus of Caesarea
- Saint Eventius of Saragossa
- Saint Evetius of Nicomedia
- Saint Exuperantius of Spoleto
- Saint Fabius of Caesarea
- Saint Fabius of Sabina
- Saint Faith
- Saint Faustinus of Rome
- Saint Faustus of Alexandria
- Saint Faustus of Cordoba
- Saint Febronia of Nisibis
- Saint Felice of Aquileia
- Saint Felice of Tubzak
- Saint Felicissimus of Campania
- Saint Felicissimus of Perugia
- Saint Felicissimus of Todi
- Saint Felix of Campania
- Saint Felix of Milan
- Saint Felix of Saragossa
- Saint Felix of Spoleto
- Saint Felix of Thagura
- Saint Felix of Thibiuca
- Saint Ferreolus the Tribune
- Saint Festus of Pozzuoli
- Saint Fidelis of Edessa
- Saint Firmina of Amelia
- Saint Firminus of Amiens
- Saint Flavian of Civitavecchia
- Saint Flavius of Nicomedia
- Saint Florentia of Agde
- Saint Florentius of Carthage
- Saint Florentius of Osimo
- Saint Florian of Lorch
- Saint Fortunanziano of Carthage
- Saint Fortunata of Caesarea
- Saint Fortunato the Theban
- Saint Fortunatus of Aquileia
- Saint Fortunatus of Salerno
- Saint Fortunatus of Thibiuca
- Saint Fronto of Saragossa
- Saint Gabinus
- Saint Gaius of Ancyra
- Saint Gaius of Messina
- Saint Gaius of Salerno
- Saint Gaius of Saragossa
- Saint Geminianus of Rome
- Saint Genesius of Rome
- Saint Germanus of Alexandria
- Saint Germanus of Cadiz
- Saint Germanus of Caesarea
- Saint Glycerius of Nicomedia
- Saint Gordius of Cappadocia
- Saint Gorgonio of Nicomedia
- Saint Gorgonius of Nicomedia
- Saint Grace of Saragossa
- Saint Gracilian
- Saint Graecina of Volterra
- Saint Gratus
- Saint Gratus of Thagura
- Saint Gurias of Edessa
- Saint Hector
- Saint Heliodorus
- Saint Heliodorus the Martyr
- Saint Heraclius of Porto Romano
- Saint Heraclius of Todi
- Saint Heraclius the Soldier
- Saint Heradius of Noyon
- Saint Hermes of Adrianople
- Saint Hesychius of Mytilene
- Saint Hieron of Mytilene
- Saint Hieronides of Alexandria
- Saint Hilary of Nicomedia
- Saint Hilary of Viterbo
- Saint Honorius of Asta
- Saint Imbenia
- Saint Indes of Nicomedia
- Saint Irais
- Saint Irenaeus of Rome
- Saint Irenaeus of Sirmium
- Saint Irenaeus of Thessalonica
- Saint Irene of Thessalonica
- Saint Irenes of Thessalonica
- Saint Isacius of Nicomedia
- Saint Isidore of Campania
- Saint Januaria of Porto Romano
- Saint Januarius of Carthage
- Saint Januarius of Cordoba
- Saint Januarius of Naples
- Saint Januarius of Sassari
- Saint Januarius of Thibiuca
- Saint Joannes of Ephesus
- Saint John of Tomi
- Saint John the Physician
- Saint Julia of Carthage
- Saint Julia of Lisbon
- Saint Julia of Merida
- Saint Julia of Saragossa
- Saint Julia the Martyr
- Saint Julian of Anazarbus
- Saint Julian of Antioch
- Saint Julian of Auvergne
- Saint Juliana of Amisus
- Saint Juliana of Mataró
- Saint Julitta of Ancyra
- Saint Julitta of Iconium
- Saint Julius of Nicomedia
- Saint Julius of Pais-de-Laon
- Saint Julius of Thagura
- Saint Julius the Veteran
- Saint Justa of Carthage
- Saint Justin of Trier
- Saint Justina of Padua
- Saint Justina of Seville
- Saint Justus of Beauvais
- Saint Justus of Campania
- Saint Justus of Trieste
- Saint Kragon
- Saint Largus
- Saint Laurentia
- Saint Leocadia of Toledo
- Saint Leonida of Novellara
- Saint Leontius of Aegea
- Saint Leontius of Alexandria
- Saint Leontius of Lydda
- Saint Leontius of Perga
- Saint Lollia of Ancyra
- Saint Longinus of Lydda
- Saint Lucia of Campania
- Saint Lucian of Antioch
- Saint Lucian of Campania
- Saint Lucilla of Novellara
- Saint Lucius of Constantinople
- Saint Lucius of Cyprus
- Saint Lucy of Rome
- Saint Lupercus of Léon
- Saint Lupercus of Saragossa
- Saint Luxorius of Sardinia
- Saint Magino of Tarragona
- Saint Maginus
- Saint Mannea of Tomi
- Saint Marcellinus
- Saint Marcellinus of Tomi
- Saint Marcellus of Spoleto
- Saint Marcia of Campania
- Saint Marcian of Venafro
- Saint Marciana of Caesarea
- Saint Marcionilla of Antioch
- Saint Mardarius of Sebaste
- Saint Mardonius of Nicomedia
- Saint Mariano of Acerenza
- Saint Marianus of Nicomedia
- Saint Marinus of Anzarba
- Saint Martial of Cordoba
- Saint Martial of Saragossa
- Saint Mary the Slave
- Saint Matrona of Amisus
- Saint Matrona of Ancyra
- Saint Maura of Antinoe
- Saint Maurus of Porec
- Saint Maxentius of Trier
- Saint Maxima
- Saint Maxima of Lisbon
- Saint Maxima of Tebourba
- Saint Maximus of Dorostorum
- Saint Maximus of Durostorum
- Saint Maximus of Nicomedia
- Saint Maximus of Rome
- Saint Maximus of Sabina
- Saint Menas Kallikelados
- Saint Mennone the Centurian
- Saint Methodius of Olympus
- Saint Mígdonus of Nicomedia
- Saint Modestus of Agde
- Saint Modestus the Deacon
- Saint Mucius
- Saint Nabor of Milan
- Saint Nabor of Rome
- Saint Narcissus of Gerona
- Saint Nazarius of Rome
- Saint Neon of Lydda
- Saint Neopolus of Alexandria
- Saint Nestor of Thessalonica
- Saint Nicander of Alexandria
- Saint Nicander of Mytilene
- Saint Nicander of Venafro
- Saint Nilus of Phunon
- Saint Nilus of Tyre
- Saint Olympiades
- Saint Optatus of Saragossa
- Saint Orestes of Cappadocia
- Saint Orestes of Sebaste
- Saint Palatias
- Saint Palladius of Rome
- Saint Panteleon
- Saint Paphnutius of Egypt
- Saint Paphnutius of Skete
- Saint Papias the Martyr
- Saint Papulus
- Saint Pastor of Nicomedia
- Saint Patermuzio of Phunon
- Saint Paul of Noyon
- Saint Paul of Porto Romano
- Saint Paula of Málaga
- Saint Paulillus of Nicomedia
- Saint Paulinus of Todi
- Saint Pausis of Caesarea
- Saint Pelagia of Tarsus
- Saint Peleus of Phunon
- Saint Peleus of Tyre
- Saint Peregrinus of Thessalonica
- Saint Peter of Nicomedia
- Saint Peter of Nicomedia
- Saint Peter of Tomi
- Saint Peter the Exorcist
- Saint Phaina of Ancyra
- Saint Philemon of Antinoë
- Saint Philip of Adrianople
- Saint Philip of Heraclea
- Saint Philoterus
- Saint Photinus of Marmora
- Saint Poliano of Novellara
- Saint Polius of Mauretania
- Saint Pollio of Cybalae
- Saint Pontian of Rome
- Saint Potamia of Thagura
- Saint Potamiaena of Alexandria the Younger
- Saint Practextatus of Rome
- Saint Praepedigna of Rome
- Saint Primitivus of Saragossa
- Saint Primo
- Saint Priscianus of Caesarea
- Saint Probus of Ancyra
- Saint Probus of Side
- Saint Procopius of Ceasarea
- Saint Proculus of Pozzuoli
- Saint Proculus the Soldier
- Saint Prosdoce
- Saint Protus of Aquileia
- Saint Protus of Sassari
- Saint Publius of Saragossa
- Saint Quadratus of Anatolia
- Saint Quinctillianus of Dorostorum
- Saint Quintilian of Durostorum
- Saint Quintilian of Saragossa
- Saint Restituta of Carthage
- Saint Restitutus of Rome
- Saint Rexius of Campania
- Saint Rhodopianus the Deacon
- Saint Rodopiano of Aphrodisias
- Saint Rogatian of Nantes
- Saint Romano of Antioch
- Saint Romulus of Caesarea
- Saint Romulus the Martyr
- Saint Rufina of Seville
- Saint Rufinus of Soissons
- Saint Rufus
- Saint Rufus of Capua
- Saint Sabino of Spoleto
- Saint Sabinus of Egypt
- Saint Sara of Antioch
- Saint Sarapion of Alexandria
- Saint Saturninus of Alexandria
- Saint Saturninus of Cagliari
- Saint Saturnius of Saragossa
- Saint Satyrus of Campania
- Saint Savina of Milan
- Saint Sebastian
- Saint Secunda of Tebourba
- Saint Secundian the Martyr
- Saint Secundilla of Porto Romano
- Saint Secundinus of Cordoba
- Saint Secundus of Amelia
- Saint Secundus of Nicomedia
- Saint Secundus of Palestrina
- Saint Selesius of Alexandria
- Saint Semproniana of Mataró
- Saint Senen
- Saint Septimus of Thibiuca
- Saint Serapion of Tomi
- Saint Serenus the Gardener
- Saint Sergius of Caesarea
- Saint Servandus of Cadiz
- Saint Settimino of Carthage
- Saint Severinus of Campania
- Saint Severus of Bizye
- Saint Severus of Heraclea
- Saint Shamuna of Edessa
- Saint Silvanus of Emesa
- Saint Silvanus of Gaza
- Saint Simplicius of Rome
- Saint Simplicius of Sardinia
- Saint Sindimius of Nicomedia
- Saint Sisinius of Cyzicus
- Saint Sisinius of Osimo
- Saint Smaragdus
- Saint Solutor of Ravenna
- Saint Sophia of Rome
- Saint Sosius of Puzzuoli
- Saint Sosthenes of Chalcedon
- Saint Soteris the Martyr
- Saint Stephen of Asta
- Saint Strato of Alexandria
- Saint Successus of Saragossa
- Saint Susanna of Rome
- Saint Symphorosa of Campania
- Saint Tarachus of Cladiopolis
- Saint Tatian of Cilicia
- Saint Tecla of Novellara
- Saint Teodora of Novellara
- Saint Thalus the Martyr
- Saint Thecla of Caesarea
- Saint Thecusa of Ancyra
- Saint Theoctista of Canope
- Saint Theodatus of Ancyra
- Saint Theodora of Alexandria
- Saint Theodore of Cyrene
- Saint Theodore of Nicomedia
- Saint Theodosia of Amisus
- Saint Theodosia of Caesarea
- Saint Theodosius
- Saint Theodotia of Canope
- Saint Theogonius of Edessa
- Saint Theonas
- Saint Theopemptus of Nicomedia
- Saint Theophila of Nicomedia
- Saint Theophilus of Nicomedia
- Saint Theophilus of Rome
- Saint Tiberius of Agde
- Saint Timolaus of Caesarea
- Saint Timothy of Gaza
- Saint Timothy of Mauretania
- Saint Timothy of Rome
- Saint Tipasio of Tigava
- Saint Trason of Rome
- Saint Trophimus of Nicomedia
- Saint Trophimus of Rome
- Saint Trophimus the Martyr
- Saint Tyrannio of Tyre
- Saint Urban of Ancyra
- Saint Urban of Campania
- Saint Urban of Saragossa
- Saint Ursicius of Nicomedia
- Saint Valentine of Ravenna
- Saint Valentine of Trier
- Saint Valentine of Viterbo
- Saint Valerian of Alexandria
- Saint Valerian of Trebizond
- Saint Valerius of Soissons
- Saint Venustian of Spoleto
- Saint Venustus of Africa
- Saint Venustus of Milan
- Saint Venustus of Milan
- Saint Verissimus of Lisbon
- Saint Vespasiano of Novellara
- Saint Victor of Braga
- Saint Victor of Chalcedon
- Saint Victor of Nicomedia
- Saint Victor of Nicomedia
- Saint Victor of Ravenna
- Saint Victoria of Cordoba
- Saint Victorinus of Nicomedia
- Saint Victorinus of Pettau
- Saint Victorius of Léon
- Saint Vincent of Bevagna
- Saint Vincent of Collioure
- Saint Vincent of Saragossa
- Saint Vitalis of Bologna
- Saint Vitalis of Campania
- Saint Vulpian of Tyre
- Saint Zacchaeus of Palestine
- Saint Zambdas of Jerusalem
- Saint Zebina of Caesarea
- Saint Zenas of Philadelphia
- Saint Zeno
- Saint Zeno of Nicomedia
- Saint Zeno of Philadelphia
- Saint Zenobia of Aegea
- Saint Zenobius of Aegea
- Saint Zenobius of Antioch
- Saint Zenone of Nicomedia
- Saint Zoilus of Cordoba
- Saint Zosimus of Cilicia
- Saint Zoticus the Philosopher