Hades' symbols were (or are whatever you wanna say) his helm of darkness/invisibility. it could make him invisible. his other symbol is a two-pronged staff (like Poseidon's trident without the middle prong).
His symbol is a cap or helmet that made the person wearing it invisible,
In Greek mythology, Hades is the ruler of the Underworld. His symbols include the cypress, the scepter, and Cerberus the three-headed dog.
Hades is the greek god and ruler of the underworld.
Hades owns the underworld in Greek mythology.
in Greek mythology, the god's name was Hades
In Greek mythology, Hades ruled the underworld.
Greek myth does not say what the palace of Hades is made of.
Persephone is the queen of Hades, Hades' unhappy wife
He was the god of the underworld ,Death and Rams
Pluto is Hades in Greek mythology.
persephone
Hades
Greek Mythology - Hades Roman Mythology - Pluto