The Art of to decorate a fireplace

The next few days here in New York are supposed to be wildly snowy. So aside from the bevvy of blogger/magazine launch parties this week, I'd love to be bundled up next to the fireplace catching up on the online glossies. Which brought me to the question that most readers ask me... 
"how do I decorate or style my fireplace?"
I am always a huge fan of artwork above the fire, something extraordinarily beautiful to gaze at.
Mirrors work too, they open up the space and with beautiful ornate framing can be a lovely sight.
A combination of both art and mirrors can work extremely well too.
I especially love this purple room and how to use architectural elements (ie. graphic molding) to create a beautiful look with amazing style.

images here and here