The custom of decorating pines in winter can be traced back to pre-Christian Europe. In an effort to ensure that life would return in the spring, they adorned pines as a form of worship in the belief that by honoring the trees, other plants would return to life. Many of the decorative treatments used by our Victorian ancestors on their Christmas trees can be replicated today, giving your tree an old-fashioned charm. Small candles, or tapers, were commonly placed on the ends of branches and lit on Christmas Eve or Christmas Morning. These original holders, and even occasionally the candles, can still be found at antiques stores or shows, though the holders are usually the worse for wear.
New holders are easier to find, much less expensive, and in much better condition.
However, if you want to begin collecting such antique Christmas items, they are available and can make a very interesting display, perhaps on a smaller tabletop tree or even incorporated into your regular tree. New holders are usually made of metal with a brass-colored plating and clip onto the branch. Candles for them are most commonly white or red. Placing them near the ends of branches is not only more authentic but also makes them more visible. I've also found that taking the time to make sure they are symmetrically placed gives the tree a more balanced look which is often more appealing to the eye.