A medallion is a piece of metal, usually carved or engraved; circular (like a coin) and large, that is used as a work of art, souvenir, medal, or worn on the body as a special symbol or as a fashion accessory.

Variety

Antioch University Santa Barbara

Presidential Medallion

This design was turned into a bronze medal used for the inauguration of Antioch's new president. The elements were chosed to reflect education, California, collective cooperation, and the president himself.

The blue and gold version was used for the inauguration invitation.