Commissioned by France-Amérique de la Louisiane Acadienne,
Dr. Thomas Arceneaux, of USL, designed a similar flag in 1965 in honor of the 200th anniversary of the arrival of Acadians in Louisiana. It divides the three colors a bit differently (see image on this page). On the flag are three symbols. The gold castle on the redfield represents the Spanish kingdom, who allowed and even assisted the Acadians in settling their new homeland. The silver fleur-de-lis on the blue field represents their French heritage. The gold star on the background represents the Virgin Mary, patron saint of the Acadians.
So this flag is identified with Acadians who migrated to Louisiana. Louisiana made this flag the official flag of the Acadiana area in 1974.