Aigís

The Aegis or Ægis was the shield or breastplate, supposedly originally worn by Zeus and then by Athena.

Creation
The Aegis was forged by Hephaestus and his assistants; the Cyclopes. Later Perseus gifted the head of the gorgon Medusa to Athena, who placed it on the shield.

Design
The shield is said to be made of gold and has a carving of Medusa's head in it's center.