Agapetus (Ancient Greek: Ἀγαπητός) was a deacon of the church of Hagia Sophia at Constantinople (about 500).
The first letters of each chapter form an acrostic of dedication that reads: "The very humble Deacon Agapetus to the sacred and venerable Emperor Justinian" (ἔκθεσις κεφαλαίων παραινετικῶν σχεδιασθεῖσα).
[1] The book deals in general terms with the moral, religious, and political duties of a ruler.
In form it is quite sententious and rhetorical, and resembles closely a similar work in the romance of Barlaam and Josaphat.
The work of Agapetus was eminently fitted for the use of medieval teachers by reason of its content, the purity of its Greek diction, and its skillful construction.