Museumserver

I have acquired a piece of art work it has a foil sticker on the back with G.Pardon I'm not real up on the art world so I'm a little lost I don't even know where to start looking for the information that I am needing I know this is a Rembrandt The Jewish Bride but I can't find anything on the gallery where it was originally sold any information would greatly be appreciated and be pointed in the right direction I would like to sell this piece of art if possible thank you for any information on this .