Hades, also known as Aïdes or Aïdoneus, was the son of Cronus and Rhea, and the youngest brother of Zeus and Poseidon. He was the ruler of that subterranean region called Erebus, which was inhabited by the shades or spirits of the dead, and also by those dethroned and exiled deities who had been vanquished by Zeus and his allies. Hades, the grim and gloomy monarch of this lower world, was the successor of Erebus, that ancient primeval divinity after whom these realms were called. Homer tells us that Hades was "of all the gods the most detested," being in their eyes the grim robber who stole from them their nearest and dearest, and eventually deprived each of them of their share in terrestrial existence. His name was so feared that it was never mentioned by mortals, who, when they invoked him, struck the earth with their hands, and in sacrificing to him turned away their faces. Hades is usually represented as a man of mature years and stern majestic mien, bearing a striking resemblance to his brother Zeus; but the gloomy and inexorable expression of the face contrasts forcibly with that peculiar benignity which so characterizes the countenance of the mighty ruler of heaven. He is seated on a throne of ebony, with his queen, the grave and sad Persephone, beside him, and wears a full beard, and long flowing black hair, which hangs straight down over his forehead; in his hand he either bears a two-pronged fork or the keys of the lower world, and at his feet sits Cerberus. He is sometimes seen in a chariot of gold, drawn by four black horses, and wearing on his head a helmet made for him by the Cyclops, which rendered the wearer invisible. This helmet he frequently lent to mortals and immortals. Hades, who was universally worshipped throughout Greece, had temples erected to his honour in Elis, Olympia, and also at Athens. His sacrifices, which took place at night, consisted of black sheep, and the blood, instead of being sprinkled on the altars or received in vessels, as at other sacrifices, was permitted to run down into a trench, dug for this purpose. The officiating priests wore black robes, and were crowned with cypress. The narcissus, maiden-hair, and cypress were sacred to this divinity.