The Codex Theodosianus (Theodosian Code) was a legal compilation issued by the emperor Theodosius II (r. 402–450 CE) in 437 CE and valid in both halves of the empire. It started as a project in 429 CE (Cod. Theod. 1.1.5), intended initially to gather imperial legislation from the reign of Constantine onward into an authoritative collection, after the manner of the earlier Gregorian and Hermogenian Codes under Diocletian (290s…