See this legally free ebook:

  • Church and State as Seen in the Formation of Christendom, by T. W. (Thomas William) Allies (London, Burns & Oates, 1882). May be viewed online, and available in epub, mobi, and plaintext format, at Project Gutenberg. A later impresion (London, Burns & Oates, 1887) may be viewed online, and available in pdf, epub, mobi, and other formats, at Internet Archive. A yet later impression (London: Burns & Oates; New York, Cincinnati, Chicago: Benziger Brothers, 1898) is available at Hathitrust Digital Library.

See these other texts on the relation of Church and State:

See these texts relating to Christian monarchy:

Posted on the Feast of Saint Thomas Aquinas in the Ordinary Form of the Roman Rite; in memory of Charlemagne, King of the Franks and Emperor of the Romans (+28 January 814 AD); and on the anniversary of the lifting of the excommunication of Henry IV at Canossa. For other online texts and legally free ebooks, you may access the List of Free eBooks (Arranged by Title) and the List of Free eBooks (Grouped by Subject).

Your life amidst the Gentiles must be beyond reproach; decried as malefactors, you must let them see, from your honourable behaviour, what you are; they will praise God for you, when his time comes to have mercy on them. For love of the Lord, then, bow to every kind of human authority; to the king, who enjoys the chief power, and to the magistrates who hold his commission to punish criminals and encourage honest men… Give all men their due; to the brethren, your love; to God, your reverence; to the king, due honour.” (I Peter ii, 12-14, 17)