Nectanebo II Offers to Osiris Hemag 360-343 B.C. Late Period The Iseum, or temple of Isis, at Behbeit el Hagar in the central Delta was built as a great cult center for Isis, who was worshipped there as almost a primordial principle: thanks to her actions, the resurrections and transformations of her husband Osiris were assured, and hence the birth and potency of their son Horus, the divine prototype of the king.The Iseum probably stood on the site of an earlier temple begun in the twenty-sixth dynasty. Nectanebo II built most of the great temple, and constructed it of dark granite, creating an imposing severe structure typical of thirtieth dynasty construction in the Delta. The king was able to decorate only one important chapel before the second Persian invasion. Work did not recommence until the reign of Ptolemy II, who completed the decoration of the sanctuary and chapels. Finally, Ptolemy III added and decorated the hypostyle hall and western façade.Sometime after Ptolemy III in t