English: A miniature painting on gilded glass medallion http://www.hp.uab.edu/image_archive/ulh/painting01.jpg from Santa Giulia Museum in Brescia, mounted on King Desiderius's Cross. In the 18th century the medallion was thought to depict a portrait of en:Galla Placidia with her children. However modern scholars have firmly rejected this identification see: https://www.jstor.org/pss/3046553. Inscriptions on the medallion are not personal names; they have instead been identified as words in the Greek dialect of Alexandria, Egypt, which was then a Roman province. See:

• Jás Elsner (2007). "The Changing Nature of Roman Art and the Art Historical Problem of Style," in Eva R. Hoffman (ed), Late Antique and Medieval Art of the Medieval World, 11-18. Oxford, Malden & Carlton: Blackwell Publishing. ISBN 978-1-4051-2071-5, p. 17, Figure 1.3 on p. 18.
• Size: 6cm diameter.^[1]