Justinian Orders Roman Law Collected into One Code

Six months after his accession to the throne in Constantinople in 527, Eastern Roman Emperor Justinian I set out to overhaul the imperial legal system. The immense volume of earlier imperial pronouncements had made judicial proceedings increasingly tangled and unwieldy. To solve this problem, the emperor established a dedicated commission empowered to cull contradictory or obsolete rulings, modify surviving passages, and compile the valid enactments into a unified collection. Completed in 529, this first edition of the Codex received the force of law throughout the empire, formally supplanting older collections such as the fifth-century Codex Theodosianus.

Following this initial success, Justinian expanded the project beyond imperial decrees to encompass the vast body of classical juristic commentary. Directed by the imperial court official Tribonian, a commission screened some 2,000 books by classical jurists who possessed traditional authority to clarify legal matters. Over the course of three years, the editors extracted and reorganized these treatises into an authoritative encyclopedia known as the Digest, or Pandects, promulgated in 533. Concurrently, Tribonian collaborated with two legal professors, Theophilus and Dorotheus, to author the Institutes. Primarily an introductory textbook for law students based heavily on the earlier manual by Gaius, the Institutes was also endowed with the binding authority of statute.