The nymph Arethusa (or Aretusa) and her myth are central to the ancient history and culture of Siracusa, Sicily. So much so, that her image, surrounded by dolphins, is featured on the ancient coins of the city–from 415-400 BCE! This coin, which I photographed through a magnifying glass, may be seen in the newly opened Medagliere (or, Goldery) in the Paolo Orsi Regional Archeological Museum in Siracusa. The details, so tiny in person, took my breath away.
Read more about Arethusa at https://experiencesicily.com/2015/06/17/the-myth-behind-ortigias-fonte-aretusa/