Century Wood Stoves How Do I Preserve A Very Old And Termite-eaten Piece Of Wood?

How do I preserve a very old and termite-eaten piece of wood? - century wood stoves

I am an antiques dealer, but not usually in the woods. I have recently acquired the 17 Century continental Europe, turned wood chandelier. It's serious eating termites and worms. I do not want to sell, and I do not know professionally restored. How can I say without any more damage?