Aristophanes (translated by Leonard-Hampson Rudd) – Knights published by Longmans, Green and Co. 1867, 453 pages, Original from the University of California [Retrieved 2015-12-22]
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Belief in divination did not die easily. On the whole the Greek writers defended it based on a "trust the gods" argument. Aristotle turned against it and with him Romans of the late Republic. For a summary of the arguments, refer to Raphals 2013, pp. 356–364. The emperors, who would brook no criticism, especially none claiming to be divine (they claimed to be gods themselves), made divination a dangerous occupation on a large scale. The advent of imperial Christianity sealed its fate. Christianity regards divination as the work of the devil, along with witchcraft. Raphals, Lisa (2013). Divination and Prediction in Early China and Ancient Greece. Cambridge, U.K.: Cambridge University Press. ISBN978-1107010758.
Location uncertain, possibly Pyrgos: Y. Béquignon (1976). "TEGYRA (Pyrgos) Boiotia, Greece". The Princeton Encyclopedia of Classical Sites. Princeton University Press; Perseus Digital Library.
Koch 2010, pp. 47–48. After tracing an origin of extispicy in Mesopotamia, Koch remarks: "M. Flower suggests that extispicy was the last of the major divination practices to reach Greece from the Near East....By the classical period extispicy was certainly a fully integrated part of Greek culture...." Koch, Ulla Susanne (2010). "Three Strikes and You're Out! A View on Cognitive Theory and the First-Millenium Extipicy Ritual". Divination and Interpretation of Signs in the Ancient World(PDF). Oriental Institute Seminars Number 6. Chicago: University of Chicago. Retrieved 2015-12-17.