Claim: Isis had a temple off of an island.
Evidence: Her cult was popular throughout Egypt , but her most important temples were at Behbeit El Hagar in the Nile delta , and , beginning in the reign with Nectanebo I -LRB- 380 -- 362 BCE -RRB- , on the island of Philae in Upper Egypt.
Behbeit El Hagar is an archaeological site in Lower Egypt.