AGAPETUS, a deacon of the church of St Sophia at Constantinople.  He presented to the emperor Justinian, on his accession in 527, a work entitled Scheda regia sive de officio regis, which contained advice on the duties of a Christian prince.  The work was often reprinted and is included in Dom Anselme Banduri’s Imperium Orientale (Paris, 1711).  There is an English translation by Thomas Paynell (1550) and a French translation, executed in 1612 from a Latin version by Louis XIII., with the assistance of his tutor, David Rivault.