The horseshoe is the “wearable device” of horse and the embodiment symbol of chivalry; It is a special courtesy given by human civilization to the horse and this kind of spiritual animals. In the west, horseshoe, like rabbit foot and clover, is regarded as a symbol of luck; Because the horseshoe is closely related to three things related to luck: the horse, the iron and the crescent shape.
Horse is a strong, beautiful and mythical companion; In almost any civilization, iron has the meaning of pursuing good fortune and avoiding bad fortune, because weapons are forged by iron; The crescent moon symbolizes the endless vitality. So nailing the hoof on the door is to fight against the power of death with great vitality. In weddings, horseshoe element means luck and many children. It is widely used in invitation cards, ring pillows, brides’ bouquets and even as wedding keepsake.
Source: @alexduquettetattoos