The Codex Theodosianus is a compilation of laws created in the 5th century under the Roman Emperor Theodosius II. It aimed to organize and clarify the vast array of legal texts that had accumulated over time. This codex served as an important reference for legal matters in the Roman Empire and influenced later legal systems. The codex consists of 16 books, covering various topics such as civil law, criminal law, and religious regulations. It reflects the values and beliefs of the time, including the growing influence of Christianity in Roman society. The Codex Theodosianus remains a vital source for understanding ancient Roman law and governance.