The Ear of Dionysius (Italian: Orecchio di Dionisio) is a limestone cave carved out of the Temenites hill in the city of Syracuse, on the island of Sicily in Italy.

The name of the cave was coined in 1608 by the painter Caravaggio,[1] who was shown the grotto by the mathematician, antiquarian and archaeologist Vincenzo Mirabella.

According to legend, Dionysius used the cave as a prison for political dissidents, and by means of the perfect acoustics eavesdropped on the plans and secrets of his captives.

Another legend claims that Dionysius carved the cave in its shape so that it would amplify the screams of prisoners being tortured in it.

[citation needed] The cave is featured as the location of the tomb of Archimedes in the 2023 film Indiana Jones and the Dial of Destiny.