State v. Chandler, 5 La. Ann. 489, 52 Am. Dec. 599 (1850)

"In State v. Chandler, 5 La. Ann. 489, 490 (1850), the Louisiana Supreme Court held that citizens had a right to carry arms openly: 'This is the right guaranteed by the Constitution of the United States, and which is calculated to incite men to a manly and noble defense of themselves, if necessary, and of their country, without any tendency to secret advantages and unmanly assassinations.”

Louisiana is a traditional open carry state. We have complete state preemption of firearms laws with the exception that laws in place prior to the passage of preemption are allowed to remain in place. In the United States, open carry is shorthand terminology for "openly carrying a firearm in public", as distinguished from concealed carry, where firearms cannot be seen by the casual observer.