CEVAP:

Twelve Tables are the earliest written sources of Roman law, which is the initial source of the civil law tradition. 

The term civil law derives from the Latin ius civile meaning the law applicable to all Roman citizens. Its origins and basic model are to be found in the compilation and codification of Roman law under Justinian in the sixth century A.D, which in the sixteenth century came to be known as Corpus iuris civilis, which can be translated as “Body of Civil Law”. This compilation consists of three books: the Digest, Codex, and Institutes. These books contain rules regarding the law of persons, the family, inheritance, property, torts, unjust enrichment, and contracts and finally the remedies by which interests protected by the law are judicially protected.