CODE NAPOLÉON. Among the most important post revolutionary reforms in France was the unification and simplification of the French laws, prepared under Napoleon Bonaparte's direction and promulgated in 1804 as the French civil code, commonly called the Code Napoléon. It served as the model for the digest of the civil laws of Orleans Territory, promulgated in 1808 and commonly called the Old Louisiana Code, which, revised and amended in 1825, 1870, and 1974 as the civil code of Louisiana, remains today the basic law of the state of Louisiana. Louisiana is unique among the states in that its legal system is based on Roman civil law, not common law.
Drago, George. Jefferson's Louisiana: Politics and the Clash of Legal Traditions. Cambridge, Mass.: Harvard University Press, 1975.
Haas, Edward F., ed. Louisiana's Legal Heritage. Pensacola, Fla.: Perdido Bay Press, 1983.