Sterling silver pendant with genuine roman coin depicting Dioscuri (Castor and Pollux) on horseback. On the reverse side of the coin we can see the Goddess Rome.Castor and Pollux were twin half-brothers in Greek and Roman mythology, known together as the Dioscuri Their mother was Leda, but they had different fathers; Castor was the mortal son of Tyndareus, the king of Sparta, while Pollux was the divine son of Zeus, who seduced Leda in the guise of a swan. The pair is thus an example of heteropaternal superfecundation. Though accounts of their birth are varied, they are sometimes said to have been born from an egg, along with their twin sisters Helen of Troy and Clytemnestra.In Latin the twins are also known as the Gemini (literally "twins") or Castores, as well as the Tyndaridae or Tyndarids. Pollux asked Zeus to let him share his immortality with his twin to keep them together, and they were transformed into the constellation Gemini. The pair were regarded as the patrons of sailors, to whom they appeared as St. Elmo's fire. They were also associated with horsemanship, in keeping with their origin as the Indo-European horse twins.All of our jewels are certified by a certificate of authenticity attesting their Greek or Roman origin!