 Synesius sent Hypatia a letter describing a hydrometer, and requesting her to have one constructed for him.There is no evidence that the historical Hypatia ever studied the heliocentric model proposed by Aristarchus of Samos or that she ever found any evidence to support it.The set used in the film is meticulously historically authentic, showing a blend of Greek, Roman, and Egyptian architectural styles that would have been fitting to the time period, but the costumes are anachronistic.