Is Sharia Law really offending people who go by Justinian’s Code? Justinian’s Code is a law system to fix/rebuild Rome, it was made by Justinian I, the first Byzantine emperor. The code was made up of four books the codex, the digesta, or Pandectae, Institutiones, and Novellae Constitutiones Post Codicem. Now to Sharia Law, Sharia law or Islamic law is the religious law forming part of the Islamic tradition. It is derived from the religious precepts of Islam, particularly the Quran and the Hadith. The source of Justinian's Code or what is was really influenced by was the original Twelve Tables. Since Justinian was the new emperor of Rome, or the new Rome, he wanted to fix Rome. So he took what Law Code was there, the Twelve Tables,