The Corpus Juris Civilis or the Body of Civil Law was Complied from 529 to 534 by order of Justinian I; thus, it is sometimes referred to as the Code of Justinian. It however contains the body Roman law previous to the reign of Justinian. This compilation, translated by S.P. Scott into English, and formatted into Three volumes, contains: The Twelve Tables, The Institutes of Gaius, The Rules of Ulpian, The Opinions of Paulus, The Enactments of Justinian, and The Constitutions of Leo.