Medallion (noun)

1. A large, decorative disk or medal, especially one hanging from a ribbon as an award or commemoration.
2. A round decorative design, especially one in relief or inlaid, used as a focal point in architecture or interior design.

Origin:

Late 17th century: from french médaillon, from italian medaglione, from medaglia "medal".

Examples:

1. The soldier received a medallion for his bravery in the war.
2. The medallion on the front of the building is made of bronze.
3. The dancer won a first prize medallion.
4. The medallion in the center of the floor is made of marble.
5. The medallion hanging from the ceiling is very old and valuable.