ONIÆ OPPIDUM and Templum, (Josephus); so called from Onias, the high-priest of the Jews in Egypt; who built a temple in imitation of that at Jerusalem, by permission of the king of Egypt, on the spot where stood the temple of Diana Agrestis in Leontopolis: it was encompassed with a brick wall, and had a large tower like that at Jerusalem (Josephus); it was the metropolis of the Nomos Heliopolites, (Ptolemy); because in Strabo's time Heliopolis was fallen to decay.