Hanging oversized art? how do I hang a huge fine art? It is almost 3...

how do I hang a huge fine art? It is almost 3 ft x 4ft? What hangers do I use on the wall, etc?
Answers:    they are call wall togs you buy them at the hardware store they do not ruin your walls and if you have antiquated walls they will also go through them and hold also they are the best article to use.do you have cable behind the fine art or are you hanging it from corner to corner.anyway the wall togs you will necessitate you will need a man also if your not handy next to help putting them within.i say that because i needed help out hanging my tv above my fireplace thats what i used the wall togs.