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 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 Caius, also called Gaius, was the bishop of Rome from 17 December 283 to his death in 296. Little information on Caius is available except that given by the Liber Pontificalis, which relies on a legendary account of the martyrdom of Susanna of Rome for its information. According to legend, Caius baptized the men and women who had been converted by Tiburtius and Castulus. His legend states that Caius took refuge in the catacombs of Rome and died a martyr.
Pope Marcellinus was the bishop of Rome from 30 June 296 to his death in 304. A historical accusation was levelled at him by some sources to the effect that he might have renounced Christianity during Emperor Diocletian's persecution of Christians before repenting afterwards, which would explain why he is omitted from lists of martyrs. The accusation is rejected, among others, by Augustine of Hippo. He is today venerated as a saint in the Catholic Church and in the Serbian Orthodox Church.
Ursula is a legendary Romano-British Christian saint. Her feast day in the pre-1970 Calendarium Romanum Generale is 21 October. There is little information about her and the anonymous group of holy virgins who accompanied and, on an uncertain date, were killed along with her at Cologne. They remain in the Roman Martyrology, although their commemoration does not appear in the simplified General Roman Calendar of the 1970 Missale Romanum.
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.
August 10 - Eastern Orthodox liturgical calendar - August 12
Saints Simplicius, Faustinus and Beatrix were siblings martyred in Rome during the Diocletian persecution.
Gorgonius or Gorgon was a Christian who was martyred in AD 304 alongside Peter Cubicularius and a certain Dorotheus 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.
Mark and Marcellian are martyrs venerated as saints by the Roman Catholic Church and the Eastern Orthodox Church. Their cult is sometimes associated with that of Saints Tranquillinus, Martia, Nicostratus, Zoe, Castulus, and Tiburtius, though not in the official liturgical books of the Church, which mention only Mark and Marcellianus among the saints for 18 June. Their mention in the General Roman Calendar on that date from before the time of the Tridentine Calendar was removed in the 1969 revision, because nothing is known about them except their names, the fact of their martyrdom, and that they were buried on 18 June in the cemetery of Santa Balbina on the Via Ardeatina.
Tiburtius, according to Christian legend, was a Christian martyr and saint. His feast day is 11 August which is the same as Saint Susanna. The two were not related, but are sometimes associated because they are venerated on the same day.
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.
Saints Tiburtius, Valerian, and Maximus are three Christian martyrs who were buried on 14 April of some unspecified year in the Catacombs of Praetextatus on the Via Appia near Rome.
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