Bracteate

A bracteate (from the Latin bractea, a thin piece of metal) is a flat, thin, single-sided gold medal worn as jewelry that was produced in Northern Europe predominantly during the Migration Period of the Germanic Iron Age (including the Vendel era in Sweden). The term is also used for thin discs, especially in gold, to be sewn onto clothing in the ancient world, as found for example in the ancient Persian Oxus Treasure, and also later silver coins produced in central Europe during the early Middle Ages.

There are also similar pieces from the neighboring Huns (and from their invasion of India) in the style of Gupta and Roman coinage.

Gold bracteates from the Migration Period

Gold bracteates commonly denote a certain type of jewelry, made mainly in the 5th to 7th century AD, represented by numerous gold specimens. Bead-rimmed and fitted with a loop, most were intended to be worn suspended by a string around the neck, supposedly as an amulet. The gold for the bracteates came from coins paid as peace money by the Roman Empire to their Northern Germanic neighbors.