At about this time the Jews of the Byzantine empire were subjected to severe persecution, from the effects of which they did not for a long time recover, and this, too, at the hands of a monarch from whom they had least expected hostile treatment. Leo, the Isaurian, the son of rude peasant parents, having had his attention drawn by the Jews and the Arabs to the idolatrous character of the image-worship which obtained in the churches, had undertaken a campaign with the intention of destroying these images. Being denounced, however, before the uncultivated mob as a heretic and a Jew by the image-worshiping clergy, Leo proceeded to vindicate his orthodoxy by persecuting the heretics and the Jews. He issued a decree commanding all the Jews of the Byzantine empire and the remnant of the Montanists in Asia Minor to embrace the Christianity of the Greek Church, under pain of severe punishment (723). Many Jews submitted to this decree, and reluctantly received baptism; they were thus less steadfast than the Montanists, who, in order to remain faithful to their convictions, assembled in their house of prayer, set fire to it, and perished in the flames. Such of the Jews as had allowed themselves to be baptized were of the opinion that the storm would soon blow over, and that they would be permitted to return to Judaism. It was, therefore, only outwardly that they embraced Christianity; for they observed the Jewish rites in secret, thereby subjecting themselves to fresh persecutions. Thus the Jews of the Byzantine empire pined away under unceasing petty persecution, and for a time they are hidden from the view of history.