In Greek mythology, the aegis was a shield or breastplate that belonged to the god Zeus. It was often portrayed as a goat skin or animal hide adorned with the head of the Gorgon Medusa. The aegis was typically depicted as imbued with magical properties and was used by Zeus and Athena to intimidate their enemies and protect their allies. It was also said to be responsible for the thunder and lightning associated with Zeus's wrath. The aegis is a symbol of power and authority, and its imagery can still be seen in modern depictions of Zeus and Athena as well as political and military organizations.