Very Rare New Orleans Square Concept Art

When this piece showed up in my files, I was in shock. I do not recall having ever seen this before- and trust me, I have one of the largest libraries of Imagineering concept art in Disney fandom. I'm convinced of that, and people send me their rare pieces too. I know this is New Orleans Square at Disneyland. I know it is the Court of Angels. And I knowby looking at it that it is probably not the work of an artist like Herb Ryman. But maybe you can help me. I do not know the artist or the year it was crafted or even what it was used for. The left side seems cut off. Does anyone know more?