The 3 Deathly hallows are the legendary items of death. In fact, according to legend, the owner of all 3 could become immortal. The 3 are the true invisibility cloak, the unbeatable wand that slays it's owner, and the stone of resurrection. The sign of all 3 is often used in rituals to summon death or any of the 4 horsemen. It is possible that they could be linked with The Illuminati as the symbol greatly resembles there symbol.