Which Byzantine emperor oversaw the creation of the Theodosian Code in 438?

The Byzantine emperor who oversaw the creation of the Theodosian Code in 438 was Theodosius II. He ruled the Eastern Roman Empire from 408 until 450, first as a child under regents and later as an active emperor.

The Theodosian Code, or Codex Theodosianus, was a major collection of imperial laws issued between 429 and 438. It gathered constitutions promulgated by emperors since Constantine I, beginning in 312, and organized them into sixteen books covering subjects such as government, taxation, the army, religion, public administration, and private law. The completed code was published in the Eastern Empire in 438 and then recognized in the Western Empire as well.

The project helped preserve and standardize Roman law during a period when the empire was divided between eastern and western courts. It also recorded the growing legal status of Christianity within the Roman state, including laws affecting pagan practices and Christian institutions. It is often confused with Justinian’s Corpus Juris Civilis, compiled about a century later under Justinian I.