In the year of Christ 286, a most remarkable affair occurred; a legion of soldiers, consisting of six thousand six hundred and sixty-six men, contained none but Christians. This legion was called the Theban Legion, because the men had been raised in Thebias: they were quartered in the east until the emperor Maximian ordered them to march to Gaul, to assist him against the rebels of Burgundy. They passed the Alps into Gaul, under the command of Mauritius, Candidus, and Exupernis, their worthy commanders, and at length joined the emperor. Maximian, about this time, ordered a general sacrifice, at which the whole army was to assist; and like-wise he commanded that they should take the oath of allegiance and swear, at the same time, to assist in the extirpation of Christianity in Gaul.
Alarmed at these orders, each individual of the Theban Legion absolutely refused either to sacrifice or take the oaths prescribed. This so greatly enraged Maximian, that he ordered the legion to be decimated, that is, every tenth man to be selected from the rest, and put to the sword. This bloody order having been put in execution, those who remained alive were still inflexible, when a second decimation took place, and every tenth man of those living was put to death. This second severity made no more impression than the first had done; the soldiers preserved their fortitude and their principles, but by the advice of their officers they drew up a loyal remonstrance to the emperor. This, it might have been presumed, would have softened the emperor, but it had a contrary effect: for, enraged at their perseverance and unanimity, he commanded that the whole legion should he put to death, which was accordingly executed by the other troops, who cut them to pieces with their swords, September 22, 286.
Quirinus, bishop of Siscia, being carried before Matenius, the governor, was ordered to sacrifice to the pagan deities, agreeably to the edicts of various Roman emperors. The governor, perceiving his constancy, sent him to jail, and ordered him to be heavily ironed; flattering himself, that the hardships of a jail, some occasional tortures and the weight of chains, might overcome his resolution. Being decided in his principles, he was sent to Amantius, the principal governor of Pannonia, now Hungary, who loaded him with chains, and carried him through the principal towns of the Danube, exposing him to ridicule wherever he went. Arriving at length at Sabaria and finding that Quirinus would not renounce his faith, he ordered him to be cast into a river, with a stone fastened about his neck. This sentence being put into execution, Quirinus floated about for some time, and, exhorting the people in the most pious terms, concluded his admonitions with this prayer: “It is no new thing, O all-powerful Jesus, for Thee to stop the course of rivers, or to cause a man to walk upon the water, as Thou didst Thy servant Peter; the people have already seen the proof of Thy power in me; grant me now to lay down my life for Thy sake, O my God.” On pronouncing the last words he immediately sank, and died, June 4, AD 308. His body was afterwards taken up, and buried by some pious Christians.
-Fox’s Book of Martyrs