Corupus Iurus Civilis or the Justinian Code, was the result of Emperor Justinian's desire that existing Roman law be collected into a simple and clear system of laws, or "code." Tribonian, a legal minister under Justinian, lead a group of scholars in a 14-month effort to codify existing Roman law. The result was the first Justinian Code, completed in 529. This code was later expanded to include Justinian's own laws, as well as two additional books on areas of the law. In 534, the Justinian Code, made up of the Code, the Digest, and the Institutes, was completed.