A ring made of gold K14 (585°) with Disc of Phaistos. The Disc of Phaistos is a disk of baked clay, which is an archaeological find from the Minoan city of Phaistos in southern Crete and probably dates to the middle or late Minoan Bronze Age . It is one of the most famous mysteries of archeology, since the purpose of its construction remains unknown. The meaning of what is written in it is still unknown.