What to do with a mirror?

mr husband has a 6ft x 4ft mirror in our games room. it is not mounted on the wall its just lying against it. it is not framed it is just a gl mirror. He doest want to get rid of it because it belonged to his late mother but it really is an eye sore and I need ideas to do something with it. the backing of the mirror is starting to mark my wall so it is bugging me!! i need super duper ideas please and ones that aint gonna cost me the earth!! thanks in advance