In the fourth and fifth centuries, for those wishing to cite imperial constitutions, the "Codex Gregorianus" became a standard work of reference, often cited alongside the "Codex Hermogenianus". The earliest explicit quotations are by the anonymous author of the "Mosaicarum et Romanarum Legum Collatio", or "Lex Dei" as it is sometimes known, probably in the 390s. In the early fifth century Augustine of Hippo cites the Gregorian Code in discussion of adulterous marriages. Most famously, the Gregorian and Hermogenian Codes are cited as a model for the organisation of imperial constitutions since Constantine I in the directive ordering their collection in what was to become the "Codex Theodosianus", addressed to the senate of Constantinople on 26 March 429, and drafted by Theodosius II's "quaestor" Antiochus Chuzon.