Corpus Juris Civilis is commonly used to refer to Justinian I’s legal reforms, which included a variety of legal writings and concepts enacted during his reign. It is also known as the Justinian Code. The Justinian Code is made up of several parts: Codex Justinianus, Digsta, Institutes, and Novellae Constitutiones. The Justinian Code served as a foundation for following legal reforms, including continental Europe’s civil law tradition.