I looked at New Orleans' Convention/Visitors Bureau and there seem to be a number of fine museums in No that could lose some of their collections.
For example, here is one:
http://www.confederatemuseum.com
This museum is south of the French Quarter and appears to have a very valuable and priceless collection of Civil War-related items.
I'd hope that some of the curators for these museums got many of these artifcats out of NO.
There is one of the best fine art photography shops in New Orleans. Wonderful images, stuff that you see in books all the time.
I hope they were able to get them all out, but I cannot imagine they would have had enough time. I guess you could just toss them into a van....Beats having them floating down the street.