Make your own fireplace.no chimney required. Use an old mantle structure and have several candles serve as your "fire." This lovely vintage room lends itself perfectly for this idea well. White mantle and mirror, candles and lanterns.
If you don't have a fireplace, but still want to hang stockings and decorate a mantel, you can craft one out of cardboard! Using cardboard display boards (ones students use for science projects), you can build a realistic (and lightweight) fireplace.
DIY Cardboard Decorated Fireplace DIY Cardboard Decorated Fireplace (I first pinned this thinking it was a miniature. But this is more for decorating for Halloween, set decorating, or a starting point for making cardboard furniture or shelving)