What state has its legal system based on roman civil law format?

Answer 1

Louisiana's civil laws and Government structure are based on Roman law. Louisiana's criminal law and all laws of the other states are based the English Common law system. Louisiana had been a French Territory using French Laws based on the Roman Law, at the time of admission to the Union most of those laws and method of administering them were left in place, a sudden change to the Common Law would have been disruptive to commerce and life in general. Areas of the Loisiana Territory out side of what became the state of Louisiana were sparsely populated and loosly administered, American/English law was implemented there.

The Roman system in Louisiana is often said to be based on the Napoleonic Code, which is not quite true, Napoleon 1st did make some changes, modernizing French Law, but French Law was still a Roman Law system.

Roman Law became the basis for Western European Law around 1150, replacing forms which arose after the breaking up of the Roman empire. Many of those replaced forms, especially in the North, were based on Nordic and Germanic systems. Roman law had little effect on England, due in earlier years to relative isolation reinforced later by England's separation from the Roman Church and general aversion to all things "Roman." In the early 1800's England and America adopted several practices from Roman law, modifying and simplifying various procedures especially in civil trial procedures, which under the English system had become cumbersome. And as time passed American/English law has affected Roman law in Louisiana law.

Answer 2

California