Ilustration of a calendar that counts doomsdays:) The ouroboros or uroboros (/ˌjʊərəˈbɒrəs/[2]) is an ancient symbol depicting a serpent or dragon[3] eating its own tail. The ouroboros is often interpreted as a symbol for eternal cyclic renewal or a cycle of life, death, and rebirth. One of the earliest known ouroboros motifs is found in the Enigmatic Book of the Netherworld, an ancient Egyptian funerary text in KV62, the tomb of Tutankhamun, in the 14th century BCE.