Code of Justinian is complete collection of current Roman law created by the order of byzantine emperor Justinian I. the Great. It is also known by its latin title, Corpus Iuris Civilis, which was coined by the glossators (11.-13th century), commentators of Justinian's legislation. Justinian had great help from chancellor Tribonian, who was responsible that the codification was completed in short period (527.-534.). The codification consists of the following parts: Codex, Digesta, Institutiones and Novellae. Codex is collection of imperial constitutions. The first, Codex Iustinianus took effect in 529. During the work on the codification it was repealed, and then lost. Codex repetitiae praelectionis was new collection of imperial constitutions created in 534. by which Codex Iustinianus was repealed. Digesta or Pandectae was a collection of jurist law and the most difficult and ambitious codification effort. It was declared and took effect in 533. after three years of work. Institutiones, declared 533., were the structure of a textbook and served primarily for legal education. Novellae were constitutions made by Justinian after the declaration of Codex 534. He used them to regulate new legal issues.