The lucky powers of the horseshoe are believed to date back to the story of a blacksmith named Dustan and a man he believed to be the devil. As the story goes, a man met Dustan and asked the blacksmith to shoe him. Dustan recognized this man as the devil and nailed a horseshoe to the devil's hoof. Seeing that the devil was in great pain, he is said to have chained him while he was in agony and released him only after the devil promised to never enter a place that had a horseshoe hanging over the door. Dustan later became Archbishop of Canterbury in 959 AD and is now known as Saint Dustan. Therefore, to prevent the devil from entering your home you need to hang a horseshoe in an upward position above you