A popular theory having to do with Christmas tree history is that the first lighted Christmas tree was set up by Martin Luther King. It's said that one cold winter Martin was out walking on Christmas Eve. It was cold and the sky was clear and full of stars. He was taken by the beauty of the evergreens covered with snow so he chopped one down, brought it inside, and decorated it with lit candles. He then told his children that Christ was Light of the World and had lit up the night sky that Christmas Eve.
*There's a certain irony in this theory that discredits it, however, as Martin Luther King is a famed reformer who denounced Christmas.