The "Toro Jubilo" or "Toro de fuego" is a festival that takes place in Medinaceli, Spain. The festival is a pre-Celtic ritual dating back to the Bronze Age. During this festival, a bull is tied to a post. Balls are then placed on each horn of the bull and lit a flame. A think layer of mud on the back and face of the bull helps protect the bull from physical injury or burns. The bull is then released by the square, which has 5 fire lit bonfires symbolizing five martyrs.