In Sumerian mythology and later for Assyrians and Babylonians, Anu was a sky-god, the god of heaven, lord of constellations, king of gods, spirits and demons, and dwelt in the highest heavenly regions. It was believed that he had the power to judge those who had committed crimes, and that he had created the stars as soldiers to destroy the wicked. His attribute was the royal tiara, most times decorated with two pairs of bull horns.