Julian the Apostate carried out his religious reforms, relying on the concept of religious piety, which he developed on the basis of the "Chaldean oracles" and contemporary Neoplatonism. His attempt to find a concordat with the Jewish communities fully fits into this concept. Having discovered the "Chaldean" origins of the religion of Abraham, Julian was able to include even the worship of Yahweh in the framework of neoPlatonic theology. The restoration of the Jerusalem temple was for him one of the elements of the renovation of divine-human communication. The lack of information about these events in medieval Jewish literature demonstrates that his attempt to include Judaism in the imperial religious ecumene was based on a misinterpretation of the Abrahamic type of religion.