Junillus (formerly spelled Junilius) was Quaestor at Justinian's court from roughly 541-549 A.D., successor of the great Tribonian. Procopius (Anecdota 20.17) is catty about him and his limited education, but there is no other reason to think him anything but a serious and skilled functionary. But his lasting interest for us arises out of his Instituta regularia divinae legis, written c. 542, digesting the hermeneutical principles of Mesopotamian Christianity. Cassiodorus (Inst. 10.1) commended him and apparently copied him, and his work had a fairly broad circulation in the Latin middle ages (for some details, see M.L.W. Laistner, Harvard Theological Review 40[1947] 19-32). This server provides an introductory essay, Latin text of the Instituta, and an English translation, all prepared by John F. Collins.