Over time, Roman Law continued to evolve, especially with the appointment of jurists who had the authority to interpret the law. One of the most notable figures in Roman Law was Justinian I, who ruled as Byzantine Emperor from 527 to 565 AD. He commissioned the creation of the "Corpus Juris Civilis," a comprehensive body of Roman law that included the "Codex Justinianus" (a code of laws), the "Digesta" or "Pandects" (a compilation of jurists' opinions), the "Institutes" (a textbook for students), and the "Novellae" (new laws).