Bullfighting traces its roots to prehistoric bull worship and sacrifice in Mesopotamia and the Mediterranean region. The first recorded bull fight may be the Epic of Gilgamesh, which describes a scene in which Gilgamesh and Enkidu fought and killed the Bull of Heaven ("The Bull seemed indestructible, for hours they fought, till Gilgamesh dancing in front of the Bull, lured it with his tunic and bright weapons, and Enkidu thrust his sword, deep into the Bull's neck, and killed it").[6] Bull leaping was portrayed in Crete, and myths related to bulls throughout Greece. The killing of the sacred bull (tauroctony) is the essential central iconic act of Mithras, which was commemorated in the mithraeum wherever Roman soldiers were stationed. The oldest representation of what seems to be a man facing a bull is on the Celtiberian tombstone from Clunia and the cave painting El toro de hachos', both found in Spain.