He lived in Nicomedia, where he turned many pagans from their idolatry to faith in Christ. For this he and several companions were seized, beaten, bound, and taken to Byzantium. On the way, several of Agathonicus’ companions died from their harsh treatment. The survivors, including Agathonicus himself, were taken to Selyvria in Thrace, where they were tortured before the Emperor himself, then beheaded.

She was born of Christian parents in Barcelona, and dedicated herself to a life of holiness, taking Christ as her bridegroom. When the persecutor Dacian came to Barcelona, Eulalia secretly left her parents’ house by night and came before Dacian, denouncing him in front of many witnesses as a murderer of the innocent, and publicly confessing her faith in Christ. The wicked Dacian had her stripped and beaten, then tied to a tree in the form of a cross, and ordered that her flesh be burned with torches. When her torturer mockingly asked ‘Where is your Christ to save you?’ she answered ‘He is here with me; you cannot see Him because of your impurity.’ When the holy Eulalia died at last under torture, the people saw a white dove fly from her mouth. An unseasonable snowstorm then covered her naked body like a white garment.