Editing Corpus Juris Civilis (section)

===Codex===
{{Main|Code of Justinian}} 
The "Codex Justinianus", "Codex Justinianeus" or "Codex Justiniani" (Latin for "Justinian's Code") was the first part to be finished, on 7 April 529. It contained in [[Latin]] most of the existing imperial ''constitutiones'' (imperial pronouncements having force of law), back to the time of [[Hadrian]]. It used both the ''[[Codex Theodosianus]]'' and the fourth-century collections embodied in the ''[[Codex Gregorianus]]'' and ''[[Codex Hermogenianus]]'', which provided the model for division into books that were themselves divided into titles. These works had developed authoritative standing.<ref>{{Cite web |title=LacusCurtius • Roman Law — Codex Gregorianus and Hermogenianus (Smith's Dictionary, 1875) |url=https://penelope.uchicago.edu/Thayer/E/Roman/Texts/secondary/SMIGRA*/Codex_G_et_H.html |access-date=2022-12-13 |website=penelope.uchicago.edu}}</ref> This first edition is now lost; a second edition was issued in 534 and is the text that has survived. At least the second edition contained some of Justinian's own legislation, including some legislation in Greek. It is not known whether he intended there to be further editions, although he did envisage translation of Latin enactments into Greek.

====Legislation about religion====
Numerous provisions served to secure the status of Christianity as the [[state religion]] of the empire, uniting Church and state, and making anyone who was not connected to the Christian church a non-citizen. The Christianity referred to is [[Chalcedonian Christianity]] as defined by the state church, which excluded a variety of other major Christian sects in existence at the time such as the [[Church of the East]] and [[Oriental Orthodoxy]].

=====Laws against heresy=====
The very first law in the Codex requires all persons under the jurisdiction of the Empire to hold the Christian faith. This was primarily aimed at heresies such as [[Nestorianism]]. This text later became the springboard for discussions of international law, especially the question of just what persons are under the jurisdiction of a given state or legal system.

=====Laws against paganism=====
Other laws, while not aimed at pagan belief as such, forbid particular pagan practices. For example, it is provided that all persons present at a pagan sacrifice may be indicted as if for murder.