Corpus Juris Civilis — Body of Civil Law (529–534 AD)

Commissioned by the Byzantine Emperor Justinian I and compiled between 529 and 534 AD, the Corpus Juris Civilis is the most comprehensive codification of Roman law ever produced. It comprises four parts: the Codex (imperial constitutions), the Digest (writings of classical jurists), the Institutes (a student textbook), and the Novellae (new legislation). Rediscovered in Western Europe in the 11th century, it became the foundation of civil law systems across continental Europe, Latin America, and beyond. Its influence on concepts of property, contract, obligation, and legal personhood is immeasurable — making it the single most consequential legal text in Western history.