Plaque depicting Thermouthis, Demeter, Serapis, Isis, Agathodaimon 2nd century B.C.-A.D. 2nd century Ptolemaic or Roman Period Serapis is flanked by Demeter with her torch and Isis who appears to hold a cornucopia. Behind Demeter is Thermouthis, the Egyptian agrarian snake-deity Renenutet. Behind Isis is Agathodaimon, a Greco-Roman benificent snake deity who received a cult in Egypt; he wears a white crown and a beard. Isis and Demeter were associated in the Greco-Roman Period, while the snake Agathodaimon is associated with Serapis, and Thermouthis with Isis.. Plaque depicting Thermouthis, Demeter, Serapis, Isis, Agathodaimon 547872