A Bracteate is a thin metal pendant disc, typically made of gold and with a stamped or repoussé decoration based on ancient Roman and Byzantine coins. The pendant is usually surmounted with a cylindrical attachment by which to suspend it. Bracteates originated in fifth-century Scandinavia and made their way throughout Europe.
5th-6th Century Scandinavian Bracteate.
Image Courtesy of The Metropolitan Museum of Art.