This dedication, made apparently by a Greek family in Alexandria, is one of the earliest surviving references to the cult of the god Sarapis, which was introducted by Ptolemy I. For some comments on the custom of making dedications 'on behalf of' the current ruler, which was common from the reign of Ptolemy I onwards, see E.Fassa, in "Shifting Social Imaginaries in the Hellenistic Period", pp.128-9 ( Google Books ).
On behalf of king Ptolemaios and his children; this was dedicated to Sarapis and Isis by Nikanor and Nikandros of the deme of Polydeukes, the sons of Nikon.
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