What is the name of the legal code compiled under Justinian I?

The legal code compiled under Justinian I was the Corpus Juris Civilis, the great sixth-century compilation of Roman law. It is also commonly called the Justinian Code, although that narrower name properly refers to only one part of the larger work.

Justinian ordered the project soon after becoming emperor in 527. A commission directed by the jurist Tribonian organized imperial legislation and classical legal writings into a more coherent system. The compilation included the Codex, the Digest, the Institutes, and later imperial enactments known as the Novels. Together, these works became the Corpus Juris Civilis.

The Digest preserved major excerpts from earlier Roman jurists, while the Institutes served as an introductory textbook for law students. The collection later became foundational to medieval and modern civil-law traditions in continental Europe. Basilika was a much later Byzantine Greek reworking, Ecloga was an eighth-century legal handbook, and the Codex Theodosianus predated Justinian.