St. Stephan of Hungry was the first Christian King of Hungry. He was baptized as an adult in 985. He was crowned King in December of the year 1000. In todays Office of Readings, he has advice for his son:
My dearest son, if you desire to honour the royal crown, I advise, I counsel, I urge you above all things to maintain the Catholic and apostolic faith with such diligence and care that you may be an example for all those placed under you by God and that all the clergy may rightly call you a man of true Christian profession. Failing to do this, you may be sure that you will not be called a Christian or a son of the Church. Indeed, in the royal palace – after the faith itself – the Church holds second place, first propagated as she was by our head, Christ; then transplanted, firmly constituted and spread through the whole world by his members, the apostles and holy fathers. And though she always produced fresh offspring, nevertheless in certain places she is regarded as ancient.
However, dearest son, even now in our kingdom the Church is proclaimed as young and newly planted; and for that reason she needs more prudent and trustworthy guardians lest a benefit which the divine mercy bestowed on us undeservedly should be destroyed and annihilated through your idleness, indolence or neglect. Read more here.
Grant that Saint Stephen of Hungary
Who fostered the growth of your Church on earth,
may continue to be our powerful helper in heaven.
We ask this through our Lord Jesus Christ, your Son,
who lives and reigns with you and the Holy Spirit,
one God forever and ever.