The transformation of Hungary into a Christian state was one of Stephen's principal concerns throughout his reign. Although the Hungarians' conversion had already begun in his father's reign, it was only Stephen who systematically forced his subjects to give up their pagan rituals. His legislative activity was closely connected with Christianity. For example, his "First Book of Laws" from the first years of his reign includes several provisions prescribing the observance of feast days and the confession before death. His other laws protected property rights and the interests of widows and orphans, or regulated the status of serfs.