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Gaius Acilius (fl. 155 BC) was a senator and historian of ancient Rome. He knew Greek, and in 155 interpreted for Carneades, Diogenes, and Critolaus, who had come to the Roman Senate on an embassy from Athens.
Plutarch cites Acilius' history in the Life of Remus. It was in Greek and contained events from at least as late as 184 BC (according to Dionysius of Halicarnassus), and it appeared around 142 BC (mentioned in Livy). The work was translated into Latin by a Claudius, most likely Claudius Quadrigarius, but only fragments survive.
- Rodríguez Mayorgas, Ana (2010), "Romulus, Aeneas and the Cultural Memory of the Roman Republic" (PDF), Athenaeum, 98 (1): 99, retrieved 14 December 2016