Antipope Felix, was a Roman archdeacon in the 4th century who was installed irregularly in 355 as an antipope and reigned until 365 after Emperor Constantius banished the current pope, Liberius. Constantius, following the refusal of the laity to accept Felix, attempted to have them co-rule, but Felix was forced to retire. He was resented in his lifetime but has enjoyed a more popular memory since. Antipope, in the Roman Catholic church, described any figure attempting to oppose the legitimately elected Bishop of Rome, with Felix being among the unsuccessful.
Pope Alexander I was the Bishop of Rome from c. 107 to his death c. 115. The Holy See's Annuario Pontificio (2012) identifies him as a Roman who reigned from 108 or 109 to 116 or 119. Some believe he suffered martyrdom under the Roman emperor Trajan or Hadrian.
Pope Pius I was the bishop of Rome from c. 140 to his death c. 154, according to the Annuario Pontificio. His dates are listed as 142 or 146 to 157 or 161, respectively. He is considered to have opposed both the Valentinians and Gnostics during his papacy. He is considered a saint by the Catholic Church and the Eastern Orthodox Church with a feast day in 11 July, but it is unclear if he died as a martyr.
Pope Stephen I was the bishop of Rome from 12 May 254 to his death on 2 August 257. He was later canonized as a saint and some accounts say he was martyred while celebrating mass.
Pope Felix I was the 26th bishop of Rome from 5 January 269 to his death on 30 December 274.
Pope Soter was the bishop of Rome from c. 167 to his death in c. 174. According to the Annuario Pontificio, the dates may have ranged from 162–168 to 170–177. He was born in Fondi, Campania, today Lazio region, Italy. Soter is known for declaring that marriage was valid only as a sacrament blessed by a priest and also for formally inaugurating Easter as an annual festival in Rome. His name, from Greek Σωτήριος from σωτήρ "saviour", would be his baptismal name, as his lifetime predates the tradition of adopting papal names.
Pope Lucius I was the bishop of Rome from 25 June 253 to his death on 5 March 254. He was banished soon after his consecration, but gained permission to return. He was mistakenly classified as a martyr in the persecution by Emperor Valerian, which did not begin until after Lucius' death.
Pope Anacletus, also known as Cletus, was bishop of Rome, following Peter and Linus. Anacletus served as pope between c. 79 and his death, c. 92. Cletus was a Roman who, during his tenure as pope, ordained a number of priests and is traditionally credited with setting up about twenty-five parishes in Rome. Although the precise dates of his pontificate are uncertain, he "...died a martyr, perhaps about 91". Cletus is mentioned in the Roman Canon of the mass; his feast day is April 26.
Pope Zephyrinus was the bishop of Rome from 199 to his death on 20 December 217. He was born in Rome, and succeeded Victor I. Upon his death on 20 December 217, he was succeeded by his principal advisor, Callixtus I. He is known for combating heresies and defending the divinity of Christ.
Saint Valentine was a 3rd-century Roman saint, commemorated in Western Christianity on February 14 and in Eastern Orthodoxy on July 6. From the High Middle Ages, his Saints' Day has been associated with a tradition of courtly love. He is also a patron saint of Terni, asthma and beekeepers. Saint Valentine was a clergyman – either a priest or a bishop – in the Roman Empire who ministered to persecuted Christians. He was martyred and his body buried at a Christian cemetery on the Via Flaminia on February 14, which has been observed as the Feast of Saint Valentine since at least the eighth century.
Cyriacus, sometimes Anglicized as Cyriac, according to Christian tradition, is a Christian martyr who was killed in the Diocletianic Persecution. He is one of twenty-seven saints, most of them martyrs, who bear this name, of whom only seven are honoured by a specific mention of their names in the Roman Martyrology.
Saints Simplicius, Faustinus and Beatrix were siblings martyred in Rome during the Diocletian persecution.
Saint Gorgonius of Nicomedia was a Christian martyr, part of the group Gorgonius, Peter Cubicularius and Dorotheus, who died in 304 AD at Nicomedia during the Diocletianic Persecution.
Saint Gabinus is the title given to two personages.
Martinian and Processus were Christian martyrs of ancient Rome. Neither the years they lived nor the circumstances of their deaths are known. They are currently buried in St. Peter's Basilica in Rome.
Susanna of Rome was a Christian martyr of the Diocletianic Persecution. Her existing hagiography, written between about 450 and 500, is of no historical value and the relations it attributes to Susanna are entirely fictitious. It is probable that a real martyr named Susanna lies behind the literary invention.
Felicitas of Rome, also anglicized as Felicity, is a saint numbered among the Christian martyrs. Apart from her name, the only thing known for certain about this martyr is that she was buried in the Cemetery of Maximus, on the Via Salaria on a 23 November. However, a legend presents her as the mother of the seven martyrs whose feast is celebrated on 10 July. The Eastern Orthodox Church celebrates their martyrdom on 25 January.
Basilides, Cyrinus, Nabor and Nazarius are saints of the Catholic Church, mentioned in the Martyrology of Bede and earlier editions of the Roman Martyrology for 12 June as four Roman martyrs who suffered death under Diocletian.
Marcellus and Apuleius were third- or fourth-century martyrs who were inserted in the General Roman Calendar in the 13th century. They were recognized as saints by the Catholic Church, with 7 October as their feast day. Apuleius is considered purely legendary, and is no longer recognized.
Saint Boniface of Tarsus was, according to legend, executed for being a Christian in the year 307 at Tarsus, where he had gone from Rome in order to bring back to his mistress Aglaida relics of the martyrs.
