What is the Justinian Code?

The Justinian Code, also known as Corpus Iuris Civilis, was a collection of all Roman laws into a simple system, ordered by emperor Justinian. The first Justinian Code, compiled by Tribonian, was finished in 529. After this code was finished, Justinian expanded on it with two other books, and included his own views of the law. The Justinian Code then ended up being formed by The Code, The Digest and The Institutes, which are the basis for most legal systems today.