Renaissance Revival Portrait Plate?

Need some help identifying the origin of this piece. So an evaluation can be made. Cant find anything concrete in my solo research. Really beautiful piece and their is some identifying information on it, but i cant find anything similiar on the internet. May be due to my inexperience with this type of antique. Their is a signature in gold at the bottom it is "G Amau or Amall" thier is a bit more to it (maybe one letter) but it is covered by the plate hanger. Updated 5-24-2024 I have solved the mystery of the signature it is "G. Amaury". I have found 3 works by him 2 are furniture and the other is a pair of vases. Other then that I can not find any information about the artist other then his works are 19th century and french. Reluctant to remove the plate hanger it is wired in pretty tight. I dont want to cause any damage. Its survived this long in immaculate condition dont want to be the one to change that. But i will if necessary. Any help would be greatly appreciated. Please contact me if you need more pics. P.S. their are no identifying marks on the back. All their is the portrait, signature, and the symbol on the front to help with identification. Plate/charger diameter is 20" Thank you! G.