Upon their return to Egypt in 309, they were stopped at the gates of Caesarea, Palestine, and questioned. Upon confessing the reason for their journey, they were arrested. The following day they, along with Pamphilus who had also been caught up in the persecutions, were brought before the provincial governor Firmilian.
Accused of being Christians, they were racked and interrogated. Elias and his friends identified themselves by their baptismal names and their country as "Jerusalem", a reference to the Christians' heavenly Jerusalem. The city of Jerusalem had been sacked by Titus and later rebuilt as Aelia Capitolina. Firmilian had them further tortured to discover the location of their true country, and at last, tired with tormenting them, condemned them to be beheaded.
When Porphyry, a servant of Pamphilus, demanded that the bodies be buried, he was tortured and then burned to death when it was found that he was a Christian. St. Seleucus witnessed his death and was overheard applauded Porphyry's constancy in the face of this terrible death; whereupon he was arrested by the soldiers involved in the execution, brought before the governor, and beheaded at Firmilian's order. The historian Eusebius was in Caesarea, and gave a vivid account of their martyrdom by torture and beheading.
Year 309 (CCCIX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Licinianus and Constantius (or, less frequently, year 1062 Ab urbe condita). The denomination 309 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.February 16
February 16 is the 47th day of the year in the Gregorian calendar. 318 days remain until the end of the year (319 in leap years).List of early Christian saints
This is a List of 1,067 Early Christian saints— saints before 450 AD— in alphabetical order by Christian name.
Wikipedia contains a calendar of saints listed by the day of the year on which they are traditionally venerated, as well as a Chronological list of saints and blesseds, listed by their date of death.