Copper wall hanging 37 1/2 inches round

37 1/2" diameter copper engraved or etched plate wieghing 25 lbs. Engravings look like Egyptian warriors with weapons and swords, snakes, birds, camels, horned animals three pryamids in the center with sun above and sphinx.  The only markings we find two separate N's on the bottom.  We purchased from an estate sale & know nothing more about the piece.