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| A sound amplifying device in the Dome of Dionysus, a dungeon in Sicily built by Dionysus about 400 BC., as illustrated in: Athanasius Kircher’s Phonurgia nova sive conjugium mechanico-physicum artis & naturae paranymta phonosophia concinnatum. Kempten : Rudolph Dreherr, 1673. (p. 84). |